1. Day 6 Homework Solutions
1
1

2. 33) 34)
­1 5
3
­1 ­4

3. A function of an angle is equal to the cofunction of its complement.
There are 3 pairs of cofunctions:
1. sine and cosine
2. secant and cosecant
3. tangent and cotangent
Examples:
1. sin 800 = cos 100
2. sec 800 = csc 100
3. tan 800 = cot 100
Try:
1. cos 50 = sin ____ 2. tan 600 = cot ____ 3. csc 120 = sec ____

4. Example: Find θ to make the
statement true.
1. sin 2θ = cos (θ + 15)

5. Write the expression as a function of an acute angle whose
measure is less than 450
1. tan 720
2. sec 1250
0
3. cot ­277

6. Attachments
Terminal­Initial Sides of Rotations.gsp