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December 21, 2014

December 21, 2014

Posted by **Hannah** on Friday, March 5, 2010 at 6:31pm.

tanx - sec^2x/tanx

tan^2(x)/tan(x) - sec^2x/tanx =

tan^2x sec^2x / tanx

then I use the identity 1+tan^2u=sec^2u

I do not know what to do at this point.

- Pre-Cal -
**Reiny**, Friday, March 5, 2010 at 6:40pmfrom you second line

tan^2(x)/tan(x) - sec^2x/tanx

= (tan^2 x - sec^2 x)/tanx

= (tan^2 x - (1 + tan^2 x))/tanx

= -1/tanx or -cotx or -sinx/cosx

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