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Автор - lenockafedorova998

Помогите вычислить интеграл от 0 до - П/4 (1+tg^2x)

Ответ

Автор - igundane

intlimits^{-frac{pi}{4} }_0 {1+tg^2(x)} , dx =intlimits^{-frac{pi}{4} }_0 {sec^2(x)} , dx\intlimits {sec^2(x)} , dx =tg(x)+C\F(b)-F(a)=tg(-frac{pi}{4})-tg(0)=-1-0=-1

sec(x)=frac{1}{cos(x)}

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