What is the integral from 0 to 0.4 of sin(x^2) ?

The integral from 0 to 0.4 of sin(x^2) is 1.25331…\S(sqrt(2/pi)*0.4)-1.25331…\S(sqrt(2/pi)*0)

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integral from 0 to 0.4 of sin(x^2)

\int_{0}^{0.4} sin (x^{2}) d x

1.25331 \dots § (\frac{2}{π} \cdot 0.4) - 1.25331 \dots § (\frac{2}{π} \cdot 0)

Solution steps

\int_{0}^{0.4} sin (x^{2}) d x

Use the nonelementary integral:

\int sin (x^{2}) d x = \frac{π}{2} § (\frac{2}{π} x)

= [\frac{π}{2} § (\frac{2}{π} x)]_{0}^{0.4}

Simplify

= [1.25331 \dots § (\frac{2}{π} x)]_{0}^{0.4}

Compute the boundaries:

1.25331 \dots § (\frac{2}{π} \cdot 0.4) - 1.25331 \dots § (\frac{2}{π} \cdot 0)

= 1.25331 \dots § (\frac{2}{π} \cdot 0.4) - 1.25331 \dots § (\frac{2}{π} \cdot 0)

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What is the integral from 0 to 0.4 of sin(x^2) ?
The integral from 0 to 0.4 of sin(x^2) is 1.25331…\S(sqrt(2/pi)*0.4)-1.25331…\S(sqrt(2/pi)*0)