Упростите выражение: (cos²a

ammaline @ammaline

August 2022 1 27 Report

Упростите выражение:

(cos²a - ctg²a)×sin²a

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nafanya2014

Verified answer

$(cos^2\alpha - ctg^2\alpha )\cdot sin^2\alpha =(cos^2\alpha -\frac{cos^2\alpha }{sin^2\alpha })\cdot sin^2\alpha =cos^2\alpha \cdot sin^2\alpha -cos^2\alpha =\\\\=cos^2\alpha \cdot (sin^2-1)=cos^2\alpha \cdot (-cos^2\alpha )=-cos^4\alpha$

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Answers & Comments

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zapishite vse dvuznachnye chisla kotorye mozhno sostavit iz cifr 1357 ispolzuac76937b938cc7c98df58dcce3b5d585 76052

pomogite pozhalujsta dat otvet na 2 voprosa srochno

reshite neravenstva 2h3lth2 h 5gt3 h 2 hlt3h 10 7h 1gth5 5h2gt3

s pomoshyu risunka 53 razyasnite geometricheskij smysl formuly a baba bdl

reshite uravnenie zaranee spasibo764bc7b97a878f88308299fd7c11e4fb 11780

reshite uravnenie obrazec na fotografii zaranee spasibo

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