Math 115 Precalculus Quiz 5

Name:__________________________________                             Date:___________

Use the addition and subtraction formulas for sine, cosine and tangent to calculate the following expressions: Circle the correct choice for all questions below.

Question 1:

1. cos(x)∙ sin(y)

B. cos(x) ∙ cos(y)

C. cos (x)

D. sin(y)

Question 2: 

1. tan(x) 
2. cot(x)
3. sin(x)
4. cos(x)

Question 3:

1. sec(x)
2. tan(x)
3. cos(x)
4. sin(x)

Question 4:   

1. tan(x)
2. 0
3. Cos(x)
4. Sin(x)

Question 5: