I have these questions in my Trig Identities homework but I don't understand how to do them.
1) 4(Cos^6X + Sin^6X) = 1 + 3 Cos^(2)2X
I don't know what to do when the Cos or Sin has an exponent more than 2.
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Thanks, But I kinda don't understand. Call me dense if you will :P Are you only solving the left side?
A slight variation on red-dog's solution . . . done in baby-steps. We have: . . . . sum of cubes . . . .
Add and subtract . . . . . . . . . . . .
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