Friday
April 25, 2014

Homework Help: precalc please help me

Posted by dylan on Sunday, April 21, 2013 at 8:35pm.

If cos^4 3 x - sin^4 3 x = cos (g(x)), then
g(x) = ??.
For part (b), use a^4-b^4=(a^2-b^2)(a^2+b^2)!

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