" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
cot² x= csc² x - 1
∫sec² x = tanx
∫csc² x = - cot x
∫ tan² x + cos² x + 4 dx =
∫ sec² x -1 + csc² -1 + 4 dx
= tan x - x -cot x - x + 4x + c
= 2x + tan x - cot x + c