The document provides instructions on using trigonometric functions to find missing angles or sides of right triangles. It begins with reminders of trigonometric definitions and ratios. Examples are then given to demonstrate finding a missing side using the Pythagorean theorem or a trigonometric ratio, and finding a missing angle using an inverse trigonometric function. Tips are provided on determining which method to use based on the information given in a problem.
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I am Ben R. I am a Statistics Assignment Expert at statisticshomeworkhelper.com. I hold a Ph.D. in Statistics, from University of Denver, USA. I have been helping students with their homework for the past 5 years. I solve assignments related to Statistics.
Visit statisticshomeworkhelper.com or email info@statisticshomeworkhelper.com.
You can also call on +1 678 648 4277 for any assistance with Statistics Assignments.
For any right triangle
Define the sine, cosine, and tangent ratios and their inverses
Find the measure of a side given a side and an angle
Find the measure of an angle given two sides
Use trig ratios to solve problems
Define the sine, cosine, and tangent ratios and their inverses
Find the measure of a side given a side and an angle
Find the measure of an angle given two sides
Use trig ratios to solve problems
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
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Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
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Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
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June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
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The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
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• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
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1. Finding Angles
Slide 1
In the past few lessons, you have learned how to use sin, cos and tan to find a
length of a side in a right triangle.
In this lesson, you will learn how to use sin, cos and tan to find a missing angle.
Reminders:
• (theta) – usually used to identify an angle (a capital letter can also be used to
identify an angle)
• adjacent – the side that is adjacent to the angle
• opposite – the side that is opposite to the angle
• hypotenuse – the side that is directly across from the right angle.
• degree mode – remember to set your calculator to degree mode
– quick check: sin 30 = 0.5
3. Slide 3
Find the following trig values to 4 decimal places:
sin 30 = sin 120 =
cos 30 = cos 120 =
tan 30 = tan 120 = -1.73215
4. sin 30 = sin 120 =
cos 30 = cos 120 =
tan 30 = tan 120 =
0.5000
0.8660
0.5774
-0.5000
0.8660
Slide 4
Find the following trig values to 4 decimal places:
-1.73215
5. Slide 5
In the previous lessons, you calculated the sine, cosine or tangent of an
angle. Example: sin 85 = 0.9962
It is also possible to calculate the angle when you are given a value.
Example:
sin A = 0.7071
A = 45
On your calculator, you will use the inverse sine, cosine or tangent
buttons to calculate the angle.
6. Slide 6
sin A = 0.7071
On your calculator,
• enter 0.7071
• press the 2nd button (or shift)
• press the sin button
You should get an answer of 44.99 A = 45
Is your calculator
in degree mode?
7. Slide 7
Steps to calculate the angle:
• enter the value
• press the 2nd button (or shift)
• press the sin-1, cos-1, or tan-1 button
Try these:
Find A: sin A = 0.9962
You should get an answer of A = 85
Is your calculator
in degree mode?
Find A: tan A = 28.6363
You should get an answer of A = 88
Find A: cos A = 0.5878
You should get an answer of A = 54
8. sin A = 0.91847 sin A = 0.8660
cos A = 0.62159 cos A = -0.7071
tan A = 1.7321 tan A = 0.2679
Slide 8
Using the inverse trig functions, find the measure of the angle (to 1
decimal place):
9. A = 66.7
A = 51.6
A = 60 A = 15
A = 135
A = 60sin A = 0.91847 sin A = 0.8660
cos A = 0.62159 cos A = -0.7071
tan A = 1.7321 tan A = 0.2679
Slide 9
Using the inverse trig functions, find the measure of the angle (to 1
decimal place):
10. If you need to find a missing
side and you know…
• at least one side
• at least one angle
(not the right angle)
Use SIN, COS, or TAN
Slide 10
Tips for Solving Triangle Problems
If you need to find the measure of an
angle and you know ….
• two or more sides
and
• the angles are unknown
Use the inverse of SIN, COS, or TAN
(2nd / Shift button is used before SIN, COS, or TAN)
If you need to find a missing
side and you know…
• two sides
Use Pythagorean Theorem
a2 + b2 = c2
11. Example 1:
Find the value of x (to two decimal places).
Slide 11
2.71
x
4.29
12. Example 1:
Find the value of x (to two decimal places).
Slide 12
2.71
x
4.29
What do you need to find?
What do you know?
What will you use to find x?
13. Example 1:
Find the value of x (to two decimal places).
Slide 13
2.71
x
4.29
What do you need to find?
What do you know?
What will you use to find x?
Missing side
Two sides
Pythagorean Theorem
2 2 2
a b c
14. Example 1:
Find the value of x (to two decimal places).
Slide 14
2.71
x
4.29
What do you need to find?
What do you know?
What will you use to find x?
Missing side
Two sides
Pythagorean Theorem
2 2 2
a b c
Identify the sides.
2 2 2
2.71 4.29 c
2
7.3441 18.4041 c
2
7.3441 18.4041 c
a
b
c
2
25.7482 c
2
25.7482 c
5.0743
5.07
c
c
Reminder – lengths are always
positive so the sign is not required.
16. Slide 16
What do you need to find?
What do you know?
What do you want to know?
57.73
x
35
Example 2:
Find the value of x (to two decimal places).
adjacent
opposite
hypotenuse
What will you use to find x?
Label the triangle
17. Slide 17
What do you need to find?
What do you know?
What do you want to know?
57.73
x
35
Example 2:
Find the value of x (to two decimal places).
Missing side
Angle and a side
Know HYPotenuse
adjacent
opposite
hypotenuse
What will you use to find x?
OPPosite
sin
opp
hyp
Label the triangle
18. Slide 18
What do you need to find?
What do you know?
What do you want to know?
57.73
x
35
Example 2:
Find the value of x (to two decimal places).
Missing side
Angle and a side
Know HYPotenuse
adjacent
opposite
hypotenuse
What will you use to find x?
OPPosite
sin
opp
hyp
Label the triangle
sin35
57.73
x
0.5736
57.73
x
0.5736
57.
57.73 57
73
.73
x
33.1139
33.11
x
x
19. Example 3:
Find the value of x (to two decimal places).
Slide 19
6.48
10.87
x
20. Example 3:
Find the value of x (to two decimal places).
Slide 20
What do you need to find?
What do you know?
What will you use to find x?
6.48
10.87
x
adjacent
opposite
hypotenuse
Label the triangle
21. Example 3:
Find the value of x (to two decimal places).
Slide 21
What do you need to find?
What do you know?
What will you use to find x?
6.48
10.87
x
adjacent
opposite
hypotenuse
Label the triangle
Missing angle
Two sides: ADJacent and OPPosite
Inverse of tan: tan-1
tan
opp
adj
22. Example 3:
Find the value of x (to two decimal places).
Slide 22
What do you need to find?
What do you know?
What will you use to find x?
6.48
10.87
x
adjacent
opposite
hypotenuse
Label the triangle
Missing angle
Two sides: ADJacent and OPPosite
Inverse of tan: tan-1
tan
opp
adj
10.87
tan
6.48
x
tan 1.6775x
59.1998
59.20
x
x
Steps to calculate the angle:
• enter the value
• press the 2nd button (or shift)
• press the tan-1 button
23. Example 4:
A pirate’s treasure is buried at 100 m directly below the surface of the earth. A
hole is to be drilled in order to get at the treasure. Drilling begins directly above
the treasure but the drilling is off the vertical line by 5. By how much will the hole
miss the treasure when the hole is at the same depth as the treasure?
Slide 23
24. Example 4:
A pirate’s treasure is buried at 100 m directly below the surface of the earth. A
hole is to be drilled in order to get at the treasure. Drilling begins directly above
the treasure but the drilling is off the vertical line by 5. By how much will the hole
miss the treasure when the hole is at the same depth as the treasure?
Slide 24
100 m
5°
x treasure
Draw a diagram
25. Example 4:
A pirate’s treasure is buried at 100 m directly below the surface of the earth. A
hole is to be drilled in order to get at the treasure. Drilling begins directly above
the treasure but the drilling is off the vertical line by 5. By how much will the hole
miss the treasure when the hole is at the same depth as the treasure?
Slide 25
What do you need to find?
What do you know?
What will you use to find x?
Label the triangle
100 m
5°
x treasure
adjacent
opposite
hypotenuse
26. Example 4:
A pirate’s treasure is buried at 100 m directly below the surface of the earth. A
hole is to be drilled in order to get at the treasure. Drilling begins directly above
the treasure but the drilling is off the vertical line by 5. By how much will the hole
miss the treasure when the hole is at the same depth as the treasure?
Slide 26
What do you need to find?
What do you know?
What will you use to find x?
Label the triangle
100 m
5°
x treasure
adjacent
opposite
hypotenuse
Missing side (OPPosite)
Angle and ADJacent
Inverse of tan: tan-1
tan
opp
adj
27. Example 4:
A pirate’s treasure is buried at 100 m directly below the surface of the earth. A
hole is to be drilled in order to get at the treasure. Drilling begins directly above
the treasure but the drilling is off the vertical line by 5. By how much will the hole
miss the treasure when the hole is at the same depth as the treasure?
Slide 27
What do you need to find?
What do you know?
What will you use to find x?
Label the triangle
100 m
5°
x treasure
adjacent
opposite
hypotenuse
Missing side (OPPosite)
Angle and ADJacent
Inverse of tan: tan-1
tan
opp
adj
tan5
100
x
0.0875
100
x
0.0875
1
100 1 0
00
0
x
8.75x m
Answer:
The drill will miss the
treasure by 8.75m.