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EvaluateSin18Cos72

Answer» =sin18°cos(90°-18°)=Sin18°sin18°=2sin18°
Sin18°Cos 72°/ Sin18°Cos (90°-18°)/ Sin18°Sin18°/ Sin2 18°
Sin18°Cos72°Sin18°Cos(90°-18°)Sin18°Sin18°Sin2 18°


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