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OpenStudy (anonymous):
Please help me out by checking this?! Which of the following are trigonometric identities? A) 1+cot x tan y = sin(x+y)/sinx cos y B) 4 cos x sin x = 2 cos x +1 -2 sin x C) tan x cos x csc x =1 D) csc x -sin x/csc x = cos^2 x I got C & D, but I'd really appreciate knowing if that's correct or not!!!!
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