-cosπ,cos4π

tan(3π/2 α)dα[sin(3π/2 α)d(3π/2 α cos(3π/2 α=
图例解析如下∫cos(π α)dα∫cos(π α)d(π α=sina(π α c
f(k=cos(3πk/4 π/4 cos(πk/3 π/6)的周期 cos周期
图例解析如下∫cos(π α)dα∫cos(π α)d(π α=sina(π α c
图例解析如下∫cos(π-α)dα∫cos(π-α)d(π-α-sin(π-α)