Question: how to find the value of sin(15)?

Question: how to find the value of sin(15)?Solution :We shall write 150=450-300And apply Sin(A-B)  formulaSin(A-B) =Sin(A)Cos(B)-Cos(A)Sin(A)ThereforeSin(150) = Sin(450-300) =Sin(450)Cos(300)-Cos(450)Sin(300) Now we shall substitute following values into above formulasSin(450) =1/√2 , Cos(300) = √3/2 , Cos(450) = 1/√2 , Sin(300) =1/2That is Sin(150 …

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