Prove algebraically that the given equation is an identity cos' x csc x tan x =...

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In problems, show that each equation is an identity (a) tan(xin-1x) = x/1-x2 (b) sin(tan-1x) = x/1 + x2 (c) cos(2sin-1x) = 1 - 2x2 (d) tan(2tan-1x) = 2x/1-x2
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