Ask your own question, for FREE!
Mathematics 7 Online
OpenStudy (anonymous):

simplify cos(x+y)cosy+sin(x+y)siny

OpenStudy (anonymous):

I know I have to use the sum and difference formulas, but I'm not sure how to get it doewn to simplest terms

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!