SOLUTION: csc A cos A / sec A sin A = (csc^2A-1)

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Question 888329: csc A cos A / sec A sin A = (csc^2A-1)
Answer by Alan3354(69443) About Me  (Show Source):
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csc A cos A / sec A sin A = (csc^2A-1)
csc*cos/sec = (csc - sin)
cos/sec = 1 - sin^2
cos^2 = 1 - sin^2