1.

Prove that: (i) 1sin(x−a)sin(x−b)=cot(x−a)−cot(x−b)sin(a−b) (ii) 1sin(x−a)cos(x−b)=cot(x−a)+tan(x−b)cos(a−b)

Answer»

Prove that:
(i) 1sin(xa)sin(xb)=cot(xa)cot(xb)sin(ab)
(ii) 1sin(xa)cos(xb)=cot(xa)+tan(xb)cos(ab)



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