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July 6, 2015

Homework Help: Mathematics - Trigonometric Identities

Posted by Anonymous on Thursday, November 8, 2007 at 9:00pm.

Prove:

sinx + tanx = tanx (1 + cosx)



What I have so far:

LS:

= sinx + tanx
= sinx + (sinx / cosx)
= (sinx) (cosx) + sinx / cos
= tanx (cosx + sinx)


I don't know what to do now

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