N. P. Rasulov, I. I. Safarov, R. T. Muxitdinov


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N. P. Rasulov, I. I. Safarov, R. T. Muxitdinov



.

Masalan,




.

t=tgx , х=аrctgx,

almashtirma yordamida darhol ratsional funksiyaning integraliga keltiriladi:



.

Masalan,




.

bo‘lgani uchun, qaralayotgan integral ostidagi ifoda ratsional kasrga quyidagicha almashinadi:



.

Masalan,




Bu paragrafni quyidagi integrallarni ko‘rish bilan yakunlaymiz:



.

Bu integrallar quyidagi trigonometrik formulalar orqali yoyish usulida ikkita oson hisoblanadigan integrallarga keltiriladi:



,

,

.

Masalan,




.

Misol sifatida ushbu integralni hisoblaymiz:



.

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