a1 a2 a3 a4 are the roots of the roots of the equation sin(A + B) = ksin2a, no two of which differ by a multiple of 2π, then a1 + a2 + a3 + a4 is equal to?
a1 a2 a3 a4 are the roots of the roots of the equation sin(A + B) = ksin2a, no two of which differ by a multiple of 2π, then a1 + a2 + a3 + a4 is equal to?