Mark the correct alternative in the following: If cot (α + β) = 0, then sin (α + 2 β) is equal to

Question

Philoid · Accepted Answer

cot (α + β) = 0

sin (α + 2 β)= sin (α +β) cos(β) + sin(β) cos (α +β)

put

sin (α + 2 β)= cos(β)