What is the integral of (1+tan(x)) ?

The integral of (1+tan(x)) is x-ln|cos(x)|+C

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integral of (1+tan(x))

\int (1 + tan (x)) d x

x - ln ∣ cos (x) ∣ + C

Solution steps

\int 1 + tan (x) d x

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int 1 d x + \int tan (x) d x

\int 1 d x = x

\int tan (x) d x = - ln ∣ cos (x) ∣

= x - ln ∣ cos (x) ∣

Add a constant to the solution

= x - ln ∣ cos (x) ∣ + C

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What is the integral of (1+tan(x)) ?
The integral of (1+tan(x)) is x-ln|cos(x)|+C