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