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

if cos(x-y),cosx,cos(x+y) are in h.p then cosx sex y/2 is equal to=?

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!