# Pre-Calculus Trigonometry

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 Author: slim102471 ID: 257634 Filename: Pre-Calculus Trigonometry Updated: 2014-03-29 09:20:50 Tags: Trig Folders: Description: MATH 113 Show Answers:

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1. To calculate measure of an arc
2. To convert degrees to radians, multiply degrees by
4. The length, s, of an arc intercepted by a central angle with radian measure θ in a circle of radius, r, is
5. 1
6. sin(-x)=
-sin x
7. csc(-x)=
-csc x
8. cos(-x)=
cos x
9. sec(-x)=
sec x
10. tan(-x)=
-tan x
11. cot(-x)=
-cot x
12. cos 2θ=

13. tan 2θ
14. Power-Reducing Formula:
=
15. Power-Reducing Formula:
16. Power-Reducing Formula:
17. Half-Angle Formula:
18. Half-Angle Formula:
19. Half-Angle Formula:

20. Distance Formula
21. Slope Formula
22. i and j unit vectors
i = x axis

j = y axis
23. Vectors:

v·w=

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