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If cos ( 40 - x) = sin 30 find the value of x |
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Answer» Cos(40°+x)=sin 30°=1/2. (Sin30°=1/2) So cos (40+x)=1/2 Which means 40°+x=60° because cos60°=1/2 Thus 40°+x=60 x=60°-40°=20° X=20° |
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