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If cosx+cosy-cos(x+y)=3/2 then find the value of SinxSiny where x>0, y
cosx+cosy-cos(x+y)=3/2 is true if x=y=60ocos60o+cos60o-cos120o=1/2+1/2-(-1/2)=3/2SinxSiny=sin60o sin60o=3/4sinx siny=3/4 approve if it is r8 and useful to u..........
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