Найдите значение выражения: [tex] \frac{cos25*cos15-sin25*sin15}{cos100+cos20} [/tex]. Created by artemche99. algebra-ru

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August 2022 1 12 Report

Найдите значение выражения:
[tex] \frac{cos25*cos15-sin25*sin15}{cos100+cos20} [/tex]

Answers & Comments

ArtemCoolAc $\frac{cos(25+15)}{2cos( \frac{100+20}{2} )cos( \frac{100-20}{2} )}= \frac{cos40}{2cos60cos40}= \frac{1}{2cos60} }= \frac{1}{2* \frac{1}{2} }= \frac{1}{1}=1$

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reshite zadachu pozhalujsta opredelite obyom uglekislogo gaza co2 kotoryj obra

dayu 99 ballov kto skazhet v chyom smysl romana f m dostoevskogo besy

v treugolnike avs tochka k lezhit na storone as i delit eyo v otnoshenii 2 1 toch

Solve the linear equation 10x - 1 = 15 - 6x...

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argumenty k sochineniyu s temoj zhestokost pozhaaaaaaaaalujsta

s pod uglom 60 k gorizontu popadaet v meshok s peskom massoj 4 kg lezhashij na

najdite a a arifmeticheskoj progressii esli a a 201

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