$$\int \cos\left(x^2\right)dx$$ I tried to evaluate the formula $\int cos(x^2)dx$ using substitution integral and integration by parts... But I couldn't
Can someone help me evaluating this integration?
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7This isn't an elementary integral. – saulspatz Mar 06 '20 at 03:31
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Where does this intégral come from? What make you think it exist? – Alain Remillard Mar 06 '20 at 03:43
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https://en.wikipedia.org/wiki/Fresnel_integral – Masoud Mar 06 '20 at 03:44
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Also relevant: https://math.stackexchange.com/questions/407575/simple-explanation-of-difference-between-cosx-and-cosx2-integrals – an4s Mar 06 '20 at 03:51
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@saulspatz Thanks... How can I know the integral is elementary or not? – Ivan_Raki Mar 06 '20 at 04:04
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@Ivan_Raki the plethora of links in the comments should help. – an4s Mar 06 '20 at 04:05
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@an4s Thank you sir! – Ivan_Raki Mar 06 '20 at 04:06