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OpenStudy (anonymous):
does cos^(2)3x+sin^(2)3x=1?
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jimthompson5910 (jim_thompson5910):
Yes, in general \[\Large \cos^2(z)+\sin^2(z) = 1\] for all values of z If you want, replace '3x' with 'z' (ie z = 3x) and you'll get the identity above.
OpenStudy (anonymous):
thank you!
jimthompson5910 (jim_thompson5910):
you're welcome
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