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Mathematics 8 Online
OpenStudy (anonymous):

http://webwork.math.ttu.edu/wwtmp/equations/10/59c780daa010831640837edb24b5801.png

OpenStudy (anonymous):

cos(2sin-1(x)) = 1 - sin^2(sin-1x) = 1 - (sin(sin-1x))^2 = 1 - x^2

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