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Mathematics 7 Online
OpenStudy (anonymous):

does cos^(2)3x+sin^(2)3x=1?

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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