Which trigonometric identity should be used to evaluate the following integral? Stn(30)Cos(50)de O a. Cos-e =1-cos(20) Sin e=1-cos(20) 2 c. Sin(38)Cos(58) =(Sin(80)- Sin(20)) d. Sin e = 1- Cos e Oe. Cos 0 = 1-Sin

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