What is the integral of (cos^2(t)) ?

The integral of (cos^2(t)) is 1/2 (t+1/2 sin(2t))+C

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integral of (cos^2(t))

\int (cos^{2} (t)) d t

\frac{1}{2} (t + \frac{1}{2} sin (2 t)) + C

Solution steps

\int cos^{2} (t) d t

Rewrite using trig identities

= \int \frac{1 + cos ( 2 t )}{2} d t

Take the constant out:

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

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

Apply the Sum Rule:

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

= \frac{1}{2} (\int 1 d t + \int cos (2 t) d t)

\int 1 d t = t

\int cos (2 t) d t = \frac{1}{2} sin (2 t)

= \frac{1}{2} (t + \frac{1}{2} sin (2 t))

Add a constant to the solution

= \frac{1}{2} (t + \frac{1}{2} sin (2 t)) + C

n = 2 \sum \infty sin (\frac{1}{n})

\int_{- π}^{π} x^{2} cos (2 x) d x

\int sin^{2} (7 x) cos^{2} (7 x) d x

6 (5)^{2} - 2 (5) + 9

\frac{d}{d x} (e^{2 x} + x^{2} - 16)

What is the integral of (cos^2(t)) ?
The integral of (cos^2(t)) is 1/2 (t+1/2 sin(2t))+C