Ask your own question, for FREE!
Mathematics 9 Online
OpenStudy (anonymous):

Rewrite with only sin x and cos x. cos 2x + sin x

OpenStudy (abb0t):

\[cos(2x) = cos^2(x)-sin^2(x) = 2cos^2(x)-1\]

OpenStudy (abb0t):

and there's one more trig identity.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!