6...

vladykaelizaveta7 @vladykaelizaveta7

August 2022 1 0 Report

cos^2(a) + ctg^2(a) + sin^2 (a) при а= п/6

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Alexаndr

Verified answer

$\displaystyle cos^2a+ctg^2a+sin^2a=1+ctg^2a=\frac{1}{sin^2a}=\frac{1}{sin^2\frac{\pi}{6}}=\frac{1}{\frac{1}{4}}=4$

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