tex]...

qwer008 @qwer008

July 2022 1 3 Report

Вычислите:
а)
[tex] \cos15\pi[/tex]
б)
[tex] \sin \frac{25\pi}{2} [/tex]

Answers & Comments

sebrithien

а)

$\cos(15\pi) = \cos( \pi + 2 \times 7\pi) = \cos(\pi) = - 1$

б)

$\sin( \frac{25\pi}{2} ) = \sin( \frac{\pi}{2} + 2 \times 6\pi ) = \sin( \frac{\pi}{2} ) = 1$

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