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Posted by **Misty** on Wednesday, October 26, 2011 at 7:56pm.

(sec^4x)(tan^2x)=(tan^2x + tan^4x)sec^2x

- Math, Please Help!!! -
**Reiny**, Wednesday, October 26, 2011 at 8:48pmRS = tan^2x(1 + tan^2x)(sec^2x)

= tan^2x(sec^2x)(sec^2x) , because 1 + tan^2x = sec^2x

= tan^2x(sec^4x)

= LS