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OpenStudy (anonymous):
cos2a = 1 - 2sin^2 a TRUE or FALSE
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OpenStudy (anonymous):
True...It's also an identity.
OpenStudy (anonymous):
Just making sure, it is true! :) Thanks
OpenStudy (anonymous):
\[\bf \cos(2a)=1-2\sin^2(a) \ \leftarrow TRUE\]
OpenStudy (anonymous):
COme on bro... I know you knew that! @ilfy214
OpenStudy (anonymous):
Lolz! I must make sure its correct!
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OpenStudy (anonymous):
:-)
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