Please question no5

Useful Integrals: The following integrals are useful in Fourier series. Since f) is periodic with the interval (0, 21) may be replaced by (-T, T) or (a, a+20). ) sin nxds = 0 (vi) cos nxdr = 0 (i) sin nxdx = 7 (vii) cos nxdx =7 ii) sin nx sin mx dr =0 (vii) cos nr-cos mx dr =0 0 (iv) sin nx cos mx dr = 0 ix) sin nx cos nx ds = 0 0 (v) sin nz =0, cosnt = (-1)", where n is an integer