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Prove the following : cos(A+B)+sin(A-B) 2sin(45^@+A)cos(45^@+B) |
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Answer» SOLUTION :R.H.S. = 2sin(`45^@`+A)cos(`45^@`+B) sin(`45^@+A-45^@-B`) sin(`90^@+A+B)sin(A-B) = cos(A+B)sin(A-B) = L.H.S. |
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