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April 1, 2015

April 1, 2015

Posted by **Jin** on Thursday, August 19, 2010 at 8:19pm.

secx(tanx + tan^2x- sec^2x)

simplified to

sec x (tanx -1)?

- math -
**Reiny**, Thursday, August 19, 2010 at 8:51pmyou should have come across the identity

sec^2x = tan^2x + 1

(by dividing each term of sin^2 + cos^2x = 1 by cos^2x )

sub back in , and you got it

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