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(tanx+cotx)/tanx=(tanx/tanx) + (cotx/tanx) = 1 + (cosx/sinx)/(sinx/cosx)=1 + cos2x/sin2x = 1+cot2x= csc2x

This is a pythagorean identity.

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โˆ™ 2010-01-31 21:45:08
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Q: Tan plus cot divided by tan equals csc squared?
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