Saturday
December 20, 2014

Homework Help: Trig Identities

Posted by Deepa on Sunday, February 17, 2013 at 10:06am.

Proving identities:

1) 1+ 1/tan^2x = 1/sin^2x

2) 2sin^2 x-1 = sin^2x - cos^2x

3) 1/cosx - cosx = sin x tan x

4) sin x + tan x =tan x (1+cos x)

5) 1/1-sin^2x= 1+tan^2 x


How in the world do I prove this...please help...

I appreciateyour time thankyou soo much!!

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