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OpenStudy (zenmo):
Need help with a small arithmetic simplify.
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OpenStudy (zenmo):
How do you get sin2x/cos2x-2x=0 to sin2x-cos^2x=0?
OpenStudy (zenmo):
Precalc. Multiple-Angel and Product-to-Sum Formula Trig related
OpenStudy (unklerhaukus):
wait, — what?
OpenStudy (zenmo):
tan2x-cos2x=0 --> sin2x/cos2x-cos2x=0 --> \[\sin2x-\cos ^{2}2x\] I Don't know how to get to the 3rd step
hartnn (hartnn):
i assume the question is |dw:1426510641154:dw|
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