Question

упростите:sin (pi/3+a)-sin (pi/3-a)

Answer 1

1) sin(pi/3 + a) = sin(pi/3)*cos a + cos(pi/3)*sin a2) sin(pi/3 - a) = sin(pi/3)*cos a - cos(pi/3)*sin a3) sin... + sin... = 2*sin(pi/3)*cos a = sqrt(3)*cos a