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OpenStudy (anonymous):
simple trig proof?? 1+cos(2x)=cot(x)sin(2x) i started with the right side, and i got as far as Rs= (cosx/sinx) sin(2x) help!
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OpenStudy (anonymous):
2cos^2(x) = cosx . 2 sinx . cosx / sinx 2cos^2(x) = 2cos^2(x)
OpenStudy (anonymous):
how does the left side go from what it is to 2cos^2(x) ??
OpenStudy (anonymous):
becoz 1 +cos(2x) = 2cos^2 (x)
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