Ask your own question, for FREE!
Mathematics 16 Online
OpenStudy (anonymous):

Rewrite with only sin x and cos x. \[\cos 3x\]

OpenStudy (anonymous):

I'm kinda lost with this although I started it.

OpenStudy (loser66):

cos (3x) = cos (2x+x) apply cos(a+b) = cos a cosb -sinasinb

OpenStudy (anonymous):

|dw:1438033829988:dw|

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!