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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
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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
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OpenStudy (nali):
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