Спростити (1+tg^2 a)+1/sin^2 a (1-ctg a)^2+ (1+ctg a). Created by Украиночка15. algebra-ru

sin^2 a (1-ctg a)^2+ (1+ctg a)...

August 2022 1 7 Report

Спростити

(1+tg^2 a)+1/sin^2 a

(1-ctg a)^2+ (1+ctg a)

Answers & Comments

vovandlux $\frac{1}{cos^{2} \alpha}+\frac{1}{sin^{2} \alpha}= \frac{sin^{2} \alpha+cos^{2} \alpha}{sin^{2} \alpha*cos^{2} \alpha} = \frac{1}{sin^{2} \alpha*cos^{2} \alpha}$ = $\frac{4}{ sin^{2} 2 \alpha }$

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