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April 20, 2014

Homework Help: verifying identities

Posted by Dizzytrig on Tuesday, July 22, 2008 at 11:09am.

how do you veriy

tan x + Cot y
-------------- = tan y + cot x
1-tan x cot y




sin^4x + cos^4x = 1- 2cos^2x + 2cos^4

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