sin77Listen to music by Sin Sin 77 on Apple Music. Find top songs and albums by Sin Sin 77 including Dullaire, Nunu and more.Calculate the value of the sin of 720 ° To enter an angle in radians, enter sin(720RAD) sin(720 °) = -4.89842541528951E-16 Sine, in mathematics, is a tronometric function of an angle.