Trigonometric identities

1. 1.
   sin 43° is equal to which of these?
   a)cos 43°b)sin 47°c)tan 43°d)cos 47°
2. 2.
   Which expression equals tan θ?
   a)sin θ / cos θb)cos θ / sin θc)sin θ × cos θd)1 / sin θ
3. 3.
   sin 62° is equal to which of these?
   a)tan 62°b)sin 28°c)cos 28°d)cos 62°
4. 4.
   Simplify 2sin²θ + 2cos²θ
5. 5.
   Simplify 9sin²θ + 9cos²θ
6. 6.
   sin 63° is equal to which of these?
   a)cos 27°b)cos 63°c)sin 27°d)tan 63°
7. 7.
   sin 18° is equal to which of these?
   a)cos 18°b)sin 72°c)cos 72°d)tan 18°
8. 8.
   sin 12° is equal to which of these?
   a)tan 12°b)sin 78°c)cos 12°d)cos 78°
9. 9.
   Simplify 8sin²θ + 8cos²θ
10. 10.
    Simplify 5sin²θ + 5cos²θ
11. 11.
    sin 77° is equal to which of these?
    a)cos 13°b)tan 77°c)sin 13°d)cos 77°
12. 12.
    sin 15° is equal to which of these?
    a)sin 75°b)cos 75°c)tan 15°d)cos 15°
13. 13.
    Simplify 6sin²θ + 6cos²θ
14. 14.
    sin 35° is equal to which of these?
    a)tan 35°b)cos 35°c)cos 55°d)sin 55°
15. 15.
    sin 10° is equal to which of these?
    a)cos 10°b)sin 80°c)tan 10°d)cos 80°
16. 16.
    Simplify 3sin²θ + 3cos²θ
17. 17.
    sin 32° is equal to which of these?
    a)tan 32°b)cos 58°c)sin 58°d)cos 32°
18. 18.
    sin 40° is equal to which of these?
    a)cos 40°b)tan 40°c)sin 50°d)cos 50°
19. 19.
    Simplify 7sin²θ + 7cos²θ
20. 20.
    sin 78° is equal to which of these?
    a)cos 78°b)cos 12°c)sin 12°d)tan 78°

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