a=cos2 and b=sin7 then prove ab<0
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a×b=cos2×sin7
multiply by 2 in both sides
2ab=2sin7×cos2
2ab=sin14
ab=sin14/2
ab=0.241/2
ab=0.12
multiply by 2 in both sides
2ab=2sin7×cos2
2ab=sin14
ab=sin14/2
ab=0.241/2
ab=0.12
ajayrao2:
sry
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