The value of sin30 cos 30 -sin60 cos60
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sin 30 = 1/2
cos 30 = √3/2
sin60 = √3/2
cos60 = 1/2
so sin 30 cos 30 - sin 60 cos 60 = 0
cos 30 = √3/2
sin60 = √3/2
cos60 = 1/2
so sin 30 cos 30 - sin 60 cos 60 = 0
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