If Sin A=3/5 and Cos B = 9/41, Find the value of Sin (A-B) and Cos(A+B)
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Cos(A)=4÷5
Sin(B) = 40/41
Now put
Sin(A-B) = sin(A)cos(B) - cos(A)sin (B)
Similarly do it for cos(A+B).
Ans. -133÷205
And -84÷205
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