>>107


1回微分

(d/dx){(24/π)sin(πt/6)}
=(24/π){cos(πt/6)}(π/6)
=4cos(πt/6)


２回微分

=(d/dx){4cos(πt/6)}
=4{-sin(πt/6)}(π/6)
=-(2π/3)sin(πt/6)