" 9."quad sin(-(11 pi)/(3))

sin (- (11pi)/(3))

sin (- (11pi)/(3))

sin(-11pi)/(3)

sin((-11pi)/3)

Value of sin (-(11pi )/( 3)) is

Find the values of sin (-(11pi)/(3)) .

Value of expression sin ((pi) / (9)) + sin ((2 pi) / (9)) + sin ((3 pi) / (9)) + ... + sin ((17 pi) / ( 9)) =