Ask your own question, for FREE!
Mathematics 30 Online
OpenStudy (anonymous):

I'm posting my question up as a screen shot, I would appreciate the help to start off the problem and solve it! :D

OpenStudy (anonymous):

OpenStudy (anonymous):

the screenshot is up! I would just like to start off the problem

OpenStudy (anonymous):

help!!!

OpenStudy (anonymous):

cos2x= 2cos^2x-1 here x= 157.5 c0s(157.5x2)= 2cos^2157.5-1 cos(315)=2c0s^2157.5-1

OpenStudy (anonymous):

cos(360-45)=cos(315)= cos360cos 45+in360sin45=1/2^.5

OpenStudy (nali):

still need help?

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!