Вычислите: [tex] 1+cos(2a) [/tex] если [tex] sin(a)=-0,6 [/tex]. Created by sobakazabiyaka. algebra-ru

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August 2022 1 27 Report

Вычислите:

[tex] 1+cos(2a) [/tex]

если [tex] sin(a)=-0,6 [/tex]

Answers & Comments

dimonkofan $1+cos^{2} ( \alpha )-sin^{2} \alpha$
$sin^{2} \alpha = 0.36$
$cos^{2} \alpha = 1- sin^{2} \alpha =1-0.36=0.64$
$1+cos^{2} ( \alpha )-sin^{2} \alpha =1+0.64-0.36=1.28$

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