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OpenStudy (anonymous):
Help please ! verify the identity > cos(4x)=1-8sin^2(x) +8sin^2(x)
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OpenStudy (shamil98):
With what, exactly?..
OpenStudy (anonymous):
cos(4x)=1-8sin^2(x) +8sin^2(x) < verify this identity
OpenStudy (shamil98):
cos(4x) = 1 - 8sin^2(x) + 8sin^2(x) is cos(4x) = 1
OpenStudy (anonymous):
ok .. how to verify that cos(4x) =1
OpenStudy (shamil98):
it's false.
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OpenStudy (anonymous):
are you sure ,it is mi assignment !
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