Pre-calculus Trigonometry : Establish each identity by:

[From: ] [author: ] [Date: 11-12-05] [Hit: ]

1. sqrt(1-cosx)/sqrt(1+cos x) = csc x - cot x

Thanks in Advance!

left = sqrt((1-cos)^2)/(sqrt(1-cos^2)) = (1-cos)/sin = 1/sin - cos/sin = csc - cot

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