Evaluate the following integrals:
Convert tanx in form of sinx and cosx.
⇒
∴ The equation now becomes
Let cosx - sinx = t
∴
⇒ - (cosx + sinx)dx =dt
Substituting dt and t
We get
⇒ - ln t + c
t = cosx – sinx
∴ - ln|cosx – sinx| + c