Question-192543

Question Number 192543 by peter frank last updated on 20/May/23

Answered by leodera last updated on 20/May/23

Δ = \int_{0}^{\frac{π}{2}} \frac{\sin (x)}{\sin (x) + \cos (x)} d x

Δ = \frac{1}{2} \int_{0}^{\frac{π}{2}} \frac{\sin (x) + \cos (x)}{\sin (x) + \cos (x)} d x = \frac{1}{2} \int_{0}^{\frac{π}{2}} d x

Δ = \frac{π}{4}

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