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OpenStudy (anonymous):
Prove the identity
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OpenStudy (anonymous):
\[\frac{ tanx+tany }{ cotx-coty}= \frac{ tanxtany}{ 1-cotxcoty }\]
OpenStudy (anonymous):
= (tanx-tany)*tanxTany/-(tanx-tany) = -1*tanxtany = -tanxtany
OpenStudy (anonymous):
What?
OpenStudy (anonymous):
Do you have an answer choice?
OpenStudy (anonymous):
no...
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OpenStudy (anonymous):
So you have to just prove it with a sentence of how to found it?
OpenStudy (cggurumanjunath):
|dw:1398914239814:dw|
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