∫f(x)dx=ln[sin(3x+1)]+C.求f(x)

问题描述:

∫f(x)dx=ln[sin(3x+1)]+C.求f(x)

f(x)={ln[sin(3x+1)]+C}'
=1/sin(3x+1)*cos(3x+1)*3
=3cot(3x+1)