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Mathematics 12 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?

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