What is the integral from 1 to 10 of cos(2t) ?

The integral from 1 to 10 of cos(2t) is 1/2 (sin(20)-sin(2))

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integral from 1 to 10 of cos(2t)

\int_{1}^{10} cos (2 t) d t

\frac{1}{2} (sin (20) - sin (2))

Solution steps

\int_{1}^{10} cos (2 t) d t

Apply u-substitution

: \int_{2}^{20} cos (u) \frac{1}{2} d u

= \int_{2}^{20} cos (u) \frac{1}{2} d u

Take the constant out:

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

= \frac{1}{2} \cdot \int_{2}^{20} cos (u) d u

Use the common integral:

\int cos (u) d u = sin (u)

= \frac{1}{2} [sin (u)]_{2}^{20}

Compute the boundaries:

sin (20) - sin (2)

= \frac{1}{2} (sin (20) - sin (2))

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What is the integral from 1 to 10 of cos(2t) ?
The integral from 1 to 10 of cos(2t) is 1/2 (sin(20)-sin(2))