cos38°*cos52°-sin38°*sin52°=0
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Cos 38× Cos(90-38)- Sin38× Sin(90-38)
Cos38×Sin38-Sin38×Cos38 = 0
LHS = RHS
Cos38×Sin38-Sin38×Cos38 = 0
LHS = RHS
Answered by
1
cos38°×sin38°-sin38°×cos38°
1-1
0
1-1
0
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