Ask your own question, for FREE!
Mathematics 8 Online
OpenStudy (anonymous):

___cosb=1/2[sin(a+b)+sin(a-b]

OpenStudy (anonymous):

A. cos b B.sin b C.sin a D.cos a

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!