What is the integral from 0 to 1 of rsqrt(4-r^2) ?

The integral from 0 to 1 of rsqrt(4-r^2) is (8-3sqrt(3))/3

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integral from 0 to 1 of rsqrt(4-r^2)

\int_{0}^{1} r 4 - r^{2} d r

\frac{8 - 3 3}{3}

Decimal

0.93461 \dots

Solution steps

\int_{0}^{1} r 4 - r^{2} d r

Apply u-substitution

: \int_{4}^{3} - \frac{u}{2} d u

= \int_{4}^{3} - \frac{u}{2} d u

\int_{a}^{b} f (x) d x = - \int_{b}^{a} f (x) d x, a < b

= - \int_{3}^{4} - \frac{u}{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_{3}^{4} u d u)

Apply the Power Rule

: [\frac{2}{3} u^{\frac{3}{2}}]_{3}^{4}

= - (- \frac{1}{2} [\frac{2}{3} u^{\frac{3}{2}}]_{3}^{4})

Simplify

= \frac{1}{2} [\frac{2}{3} u^{\frac{3}{2}}]_{3}^{4}

Compute the boundaries:

\frac{16}{3} - 23

= \frac{1}{2} (\frac{16}{3} - 23)

Simplify

= \frac{8 - 3 3}{3}

\int_{8}^{10} x^{2} d x

\int_{1}^{e} I n x d x

\int_{0}^{2} 12 - 3 x^{2} d x

\int_{0}^{2} x \cdot e^{x} d x

\int_{0}^{6} 36 - t^{2} d t

What is the integral from 0 to 1 of rsqrt(4-r^2) ?
The integral from 0 to 1 of rsqrt(4-r^2) is (8-3sqrt(3))/3