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March 5, 2015

March 5, 2015

Posted by **Angela** on Wednesday, February 23, 2011 at 7:17pm.

(tan 25 degrees + tan 10 degrees) / [1 - [(tan 25 degrees)(tan 10 degrees)]]

- Precalculus -
**MathMate**, Wednesday, February 23, 2011 at 9:00pmHint: use the following trigonometric identity

tan(a+b)=(tan(a)+tan(b))/(1-tan(a)tan(b))

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