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# 4.2 p1.ppt worked

Day 1 again

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### 4.2 p1.ppt worked

1. 1. Homework QuestionsHomework Questions
2. 2. Section 4.2Section 4.2 Mrs. RamseyMrs. Ramsey
3. 3. Right Triangle Trig:Right Triangle Trig:  Find all 6 trig functions for angle B:Find all 6 trig functions for angle B: Let c = 33 and b = 18Let c = 33 and b = 18
4. 4. Right Triangle Trig:Right Triangle Trig:  Find all 6 trig functions for angle C:Find all 6 trig functions for angle C: Let a = 1 and c = 2Let a = 1 and c = 2
5. 5. Solving TrianglesSolving Triangles  Solve the triangle if c=8 and A = 37Solve the triangle if c=8 and A = 37ºº A = a = B = b = C = c =
6. 6. Elevation and Depression:Elevation and Depression:
7. 7. Another example…Another example…  From a point 340 ft away, the angle ofFrom a point 340 ft away, the angle of elevation to the top of a building is 65elevation to the top of a building is 65º.º. Find the height of the building.Find the height of the building.
8. 8. Just to add…FYI -Just to add…FYI -  cot .89 =cot .89 =  Inverse on calc:Inverse on calc: SinSin Ө = 1/2Ө = 1/2
9. 9. HomeworkHomework  p. 368 (10-18 even, 61, 62, 64, 65)p. 368 (10-18 even, 61, 62, 64, 65)  Khan Academy – click on Practice – searchKhan Academy – click on Practice – search Right Triangles and click on Special RightRight Triangles and click on Special Right Triangles. PRACTICE at least one set ofTriangles. PRACTICE at least one set of problems and include this on your homeworkproblems and include this on your homework sheet!!! Feel free to practice as much as yousheet!!! Feel free to practice as much as you want.want.