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#### Wild ownz al

##### Member

- Nov 11, 2018

- 30

Prove:

a) cos(sin

b) cos

(VERY HARD)

a) cos(sin

^{-1}x) = √(1-x^{2})b) cos

^{-1}a+cos^{-1}b = cos^{-1}(ab-√(1-a^{2})√(1-b^{2}) (edited)(VERY HARD)

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