In this worksheet, we will practice identifying equivalent angles of sine, cosine, and tangent using cofunction identities.

**Q1: **

Simplify .

- A
- B
- C
- D

**Q2: **

Simplify .

- A
- B
- C
- D

**Q3: **

Simplify .

**Q4: **

Simplify .

- A
- B
- C
- D

**Q7: **

Which of the following is equivalent to ?

- A
- B
- C
- D
- E

**Q8: **

Which of the following is equal to ?

- A
- B
- C
- D

**Q9: **

Which of the following is equal to ?

- A
- B
- C
- D

**Q10: **

Which of the following is equivalent to ?

- A
- B
- C
- D
- E

**Q11: **

Simplify .

- A
- B
- C
- D

**Q12: **

Which of the following is equal to ?

- A
- B
- C
- D

**Q13: **

Simplify .

- A
- B
- C
- D

**Q14: **

Simplify .

- A
- B
- C
- D

**Q15: **

Simplify .

- A
- B
- C
- D

**Q16: **

Which of the following is equivalent to ?

- A
- B
- C
- D
- E

**Q17: **

Which of the following is equivalent to ?

- A
- B
- C
- D
- E

**Q18: **

Simplify .

- A
- B
- C
- D

**Q19: **

Determine whether the following statement is true or false:

.

- ATrue
- BFalse

**Q20: **

True or false: .

- AFalse
- BTrue

**Q21: **

Determine whether the following statement is true or false:

.

- ATrue
- BFalse