Double-angle identities Quiz

Name: ______________________   Date: __________   Score: ____ / 10

10 questions. Calculator allowed. Show your working. steplyclass.com/trigonometry/double-angle-identities/quiz/

1. 1

   Solve sin 2θ when sin θ = 35, θ in quadrant I
   1. A) 25
   2. B) 65
   3. C) 16
   4. D) 2425

2. 2

   Solve sin 2θ when sin θ = 513, θ in quadrant I

   Answer: ____________________

3. 3

   Solve cos 2θ when sin θ = 1213, θ in quadrant I
   1. A) 25
   2. B) −119169
   3. C) 1013
   4. D) 169

4. 4

   Solve cos 2θ when sin θ = 45, θ in quadrant I

   Answer: ____________________

5. 5

   cos 2θ when cos θ = −45, θ in quadrant II
   1. A) 9
   2. B) 725
   3. C) 25
   4. D) −85

6. 6

   cos 2θ when sin θ = −513, θ in quadrant IV

   Answer: ____________________

7. 7

   cos 2θ when cos θ = −1213, θ in quadrant III
   1. A) 25
   2. B) 169
   3. C) −2413
   4. D) 119169

8. 8

   sin 2θ when tan θ = 34, θ in quadrant III

   Answer: ____________________

9. 9

   tan 2θ when tan θ = −34, θ in quadrant II
   1. A) −32
   2. B) −247
   3. C) 247

10. 10

    cos 2θ when tan θ = −125, θ in quadrant IV

    Answer: ____________________