What is the integral of 3/(cos^2(x)) ?

The integral of 3/(cos^2(x)) is 3tan(x)+C

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integral of 3/(cos^2(x))

\int \frac{3}{cos ^{2} ( x )} d x

3 tan (x) + C

Solution steps

\int \frac{3}{cos ^{2} ( x )} d x

Take the constant out:

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

= 3 \cdot \int \frac{1}{cos ^{2} ( x )} d x

Use the common integral:

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

= 3 tan (x)

Add a constant to the solution

= 3 tan (x) + C

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What is the integral of 3/(cos^2(x)) ?
The integral of 3/(cos^2(x)) is 3tan(x)+C