[tex]\sqrt{(ctg^2a-tg^2a)*cos2a} *tg2a[/tex]. Created by svetlan8888. algebra-ru

Ответ:2Объяснение:

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svetlan8888 @svetlan8888

July 2022 1 6 Report

[tex]\sqrt{(ctg^2a-tg^2a)*cos2a} *tg2a[/tex]

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braincracker

Ответ:

Объяснение:

$\sqrt{(ctg^2a-tg^2a)*cos2a} *tg2a=\sqrt{(cos^2a/sin^2a-sin^2a/cos^2a)*cos2a}*tg2a=\sqrt{((cos^4a-sin^4a)/sin^2a*cos^2a)*cos2a}*tg2a=$

$\sqrt{\frac{(cos^2a-sin^2a)*(cos^2a+sin^2a)}{sin^2a*cos^2a}*cos2a}*tg2a=\\\sqrt{\frac{4*(cos^2a-sin^2a)}{4*sin^2a*cos^2a}*cos2a}*tg2a=\\\sqrt{4*\frac{cos2a}{sin^22a}*cos2a}*tg2a=2\sqrt{\frac{cos^22a}{sin^22a}}*tg2a=2*ctg2a*tg2a=2$

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najti ploshad figury ogranichennoj liniyami xy9 x3 x6 y0

v osnovanii piramidy sabcd lezhit ravnostoronnyaya trapeciya bokovaya storona trapeci

v chempionate iz oblasti futbola igraet 7 komand skolkimi sposobami mogut raspr

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osnovoj piramidy yavlyaetsya pryamougolnik ploshad kotorogo ravna 9 dve bokovye g8cef1b04acff6fd04a95476f8ae19f15 17411

razvertkoj bokovoj poverhnosti konusa yavlyaetsya sektor s uglom 120 gradusov radi

skolko razlichnyh slov mozhno poluchit perestanovkoj bukv iz slova ogorod esli

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