1. The problem statement, all variables and given/known data lim (x→pi)〖sin(x-pi)/(x-pi)〗 2. Relevant equations i dont know if we should use trig identity sin(a-b)= sinA cos B- CosA sin B 3. The attempt at a solution i use identities to solve that, i did not get the answer. i tried to multiply by conjugate, did not work also.