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OpenStudy (anonymous):
simple trig proof?? (sorry i'm so bad at these...) tan^2(x)= 1-cos(2x)/1+cos(2x)
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OpenStudy (anonymous):
r.h.s = 2sin^2 (x) / 2 cos^2 (x) = 2 tan^2 (x)
OpenStudy (anonymous):
oh sry no 2
OpenStudy (anonymous):
no 2 where?
OpenStudy (anonymous):
in the answer...there should be no 2
OpenStudy (anonymous):
r.h.s = 2sin^2 (x) / 2 cos^2 (x) = tan^2 (x)
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