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

The integral of (sec(x)(sec(x)+tan(x))) is tan(x)+sec(x)+C

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integral of (sec(x)(sec(x)+tan(x)))

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

tan (x) + sec (x) + C

Solution steps

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

Rewrite using trig identities

= \int \frac{1 + tan ( x ) cos ( x )}{cos ^{2} ( x )} d x

Expand

\frac{1 + tan ( x ) cos ( x )}{cos ^{2} ( x )} : \frac{1}{cos ^{2} ( x )} + \frac{tan ( x )}{cos ( x )}

= \int \frac{1}{cos ^{2} ( x )} + \frac{tan ( x )}{cos ( 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 \frac{1}{cos ^{2} ( x )} d x + \int \frac{tan ( x )}{cos ( x )} d x

\int \frac{1}{cos ^{2} ( x )} d x = tan (x)

\int \frac{tan ( x )}{cos ( x )} d x = sec (x)

= tan (x) + sec (x)

Add a constant to the solution

= tan (x) + sec (x) + C

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What is the integral of (sec(x)(sec(x)+tan(x))) ?
The integral of (sec(x)(sec(x)+tan(x))) is tan(x)+sec(x)+C