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Answer all please You must show ALL work for FULL credit! 1. Verify the following identities: a. ( /5pts) sec4 x - 2 sec2 x

Answer all please

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You must show ALL work for FULL credit! 1. Verify the following identities: a. ( /5pts) sec4 x - 2 sec2 x tan2 x + tan* x = 1 b. (/5pts) 2 csc x = 1+cos x sin x sin x 1+cos x c. ( /5pts) cotx - tan x _ 2 cos x-1 sin x cos x d. (/10pts) coty - cotx = sin(x-y) sin x sin y

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