Ask your own question, for FREE!
Mathematics 17 Online
OpenStudy (anonymous):

prove than 1-tan^2x / 1+tan^2x = cos2x is an identity

OpenStudy (nubeer):

|dw:1354470309810: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!