# t5

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1. sin 0
0
2. cos 0
1
3. tan 0
0
4. sin π/6
1/2
5. sin π/4
√2/2
6. sin π/3
√3/2
7. sin π/2
1
8. cos 0
1
9. cos π/6
√3/2
10. cos π/4
√2/2
11. cos π/3
1/2
12. cos π/2
0
13. tan 0
0
14. tan π/6
√3/3
15. tan π/4
1
16. tan π/3
√3
17. tan π/2
Undefined
18. sin θ
1/csc θ
19. cos θ
1/sec θ
20. tan θ
1/cot θ
21. tan θ
sin θ/cos θ
22. cot θ
cos θ/sin θ
23. cos^2 θ + sin^2 θ
1
24. 1 + tan^2 θ
sec^2 θ
25. cot^2 θ + 1
csc^2 θ
26. sin (α ± β)
sin α cos β ± cos α sin β
27. cos (α ± β)
cos α cos β ∓ sin α sin β
28. tan (α ± β)
tan α ± tan β / 1- tan α tan β
29. sin 2θ
2 sin θ cos θ
30. cos 2θ
cos^2 θ - sin^2 θ
31. tan 2θ
2 tan θ / 1 - tan^2 θ
32. sin α sin β
1/2 [ cos (α - β) - cos (α + β) ]
33. cos α cos β
1/2 [ cos (α - β) + cos (α + β) ]
34. sin α cos β
1/2 [ sin (α + β) + sin (α - β) ]
35. cos α sin β
1/2 [ sin (α + β) - sin (α - β) ]
36. sin α + sin β
2 sin ( α + β / 2 ) cos ( α - β / 2 )
37. sin α - sin β
2 cos ( α + β / 2 ) sin ( α - β / 2 )
38. cos α + cos β
2 cos ( α + β / 2 ) cos ( α - β / 2 )
39. cos α - cos β
-2 sin ( α + β / 2 ) sin ( α - β / 2 )

## Card Set Information

 Author: Anonymous ID: 81839 Filename: t5 Updated: 2011-04-26 07:08:44 Tags: Test Math Folders: Description: Trig Special Values and Identities Show Answers:

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