What is the integral of sec(6x) ?

The integral of sec(6x) is 1/6 ln|tan(6x)+sec(6x)|+C

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integral of sec(6x)

\int sec (6 x) d x

\frac{1}{6} ln ∣ tan (6 x) + sec (6 x) ∣ + C

Solution steps

\int sec (6 x) d x

Apply u-substitution

: \int sec (u) \frac{1}{6} d u

= \int sec (u) \frac{1}{6} d u

Take the constant out:

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

= \frac{1}{6} \cdot \int sec (u) d u

Use the common integral:

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

= \frac{1}{6} ln ∣ tan (u) + sec (u) ∣

Substitute back

u = 6 x

= \frac{1}{6} ln ∣ tan (6 x) + sec (6 x) ∣

Add a constant to the solution

= \frac{1}{6} ln ∣ tan (6 x) + sec (6 x) ∣ + C

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x \to 5 + lim (I n (x^{2} - 25))

y^{^{''}} + 2 y^{^{'}} + y = t^{2} + 1 - e^{t}

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What is the integral of sec(6x) ?
The integral of sec(6x) is 1/6 ln|tan(6x)+sec(6x)|+C