Ask your own question, for FREE!
Mathematics 10 Online
OpenStudy (anonymous):

Find cos2A when cosA = -3/5 and π/2

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!