Question-208421

Question Number 208421 by lepuissantcedricjunior last updated on 15/Jun/24

Commented by Frix last updated on 15/Jun/24

Ψ = 2 \underset{0}{\int^{\frac{π}{4}}} \frac{d x}{\sqrt{\tan 2 x}} \overset{t = \sqrt{\tan 2 x}}{=} 2 \underset{0}{\int^{\infty}} \frac{d t}{t^{4} + 1} = \frac{\sqrt{2} π}{2}

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