What is the integral of 2/(cos(x)) ?

The integral of 2/(cos(x)) is 2ln|tan(x)+sec(x)|+C

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integral of 2/(cos(x))

\int \frac{2}{cos ( x )} d x

2 ln ∣ tan (x) + sec (x) ∣ + C

Solution steps

\int \frac{2}{cos ( x )} d x

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

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

Rewrite using trig identities

= 2 \cdot \int sec (x) d x

Use the common integral:

\int sec (x) d x = ln ∣ tan (x) + sec (x) ∣

= 2 ln ∣ tan (x) + sec (x) ∣

Add a constant to the solution

= 2 ln ∣ tan (x) + sec (x) ∣ + C

\int_{- 2}^{c o s (x)} 3 t d t

\int x (2 x + 3) d x

(3) (0.4)

x \to - 1 - lim (\frac{x + 1}{∣ x + 1 ∣})

\frac{d y}{d x}, x y = 45

What is the integral of 2/(cos(x)) ?
The integral of 2/(cos(x)) is 2ln|tan(x)+sec(x)|+C