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OpenStudy (anonymous):
Find the exact value of sin2Ɵ when cosƟ=-12/13; 180 degrees<Ɵ<270 degrees
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OpenStudy (campbell_st):
find sin theta 1st |dw:1347829534363:dw| use pythagoras't theorem to find x then you'll have sin (theta) then then you can evaluate cos 2(theta)
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