The calculation of the area of the plane figure enclosed by the positive metaphysical curve y = SiNx and the x-axis on [0, π]

The calculation of the area of the plane figure enclosed by the positive metaphysical curve y = SiNx and the x-axis on [0, π]

S = ∫ (0 ~ π) sinxdx = - cosx (upper limit π, lower limit 0) = 2