Ask your own question, for FREE!
Mathematics 21 Online
OpenStudy (anonymous):

Establish the identity

OpenStudy (anonymous):

\[9\sec^2u-5\tan^2u=5+4\sec^2u\]

OpenStudy (aravindg):

replace tan^2 u by sec^2 u-1

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!