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OpenStudy (anonymous):
Rewrite with only sin x and cos x sin 3x - cos x Pwease help me
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OpenStudy (anonymous):
sin 3x = sin(2x+x) = sin2x cosx +cos2x sinx now sin2x = 2sinx cosx cos2x = cos^2x -sin^2x can you do it now??
OpenStudy (anonymous):
ummm I'm a little confused still :(
OpenStudy (anonymous):
where??
OpenStudy (anonymous):
wait would the answer be 2 sin^3 x cos^4 x +1
OpenStudy (anonymous):
i dont know the answer its lengthy question but the clue is right i just gave you
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