Question

please help me guys...​

Answer 1

Answer:

differentiation of cotx = -cosec^2x

so intigration of cosec^2x = -cotx

differentiation of cos3x= -3sin3x

so intigration of sin3x= -(1/3)cos3x

so now coming to your question-

integration of :-

3cosec^2x + 2sin3x

ANS. = -3cotx -(2/3)cos3x