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)!

Thursday

March 23, 2017
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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