Question

integration by parts by solution

Answer 1

solution :
int cos^-1 (4x^3-3x)dx
=int 1/cos (4x^3-3x)dx
=intcot (4x^3-3x)dx
=int(cot4x^3-cot 3x)dx
=int cot4 x^2 .xdx-cos2x-1
=1/2cot x^2-cos2x-1+c

Answer 2

ANSWER IS IN THE IMAGE