Найдите tg a,если cos a=-0,8 і а- кут первой четверти. Created by violetochka12. algebra-ru

Найдите tg a,если cos a=-0,8 і а- кут первой четверти...

violetochka12 @violetochka12

August 2022 1 4 Report

Найдите
tg a,если cos a=-0,8 і а- кут первой четверти

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$Cos\alpha =-0,8\\\\Sin\alpha= \sqrt{1-Cos^{2} \alpha }= \sqrt{1-(-0,8)^{2}}= \sqrt{1-0,64}= \sqrt{0,36}=0,6\\\\tg\alpha= \frac{Sin\alpha} {Cos\alpha} = \frac{0,6}{-0,8}=-0,75$

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sklasti ukrayinske slovo z bukv lelzhsnesdoa

god na cij shvidkosti vimikayutsya sheplennya i prikladayut silu 8 kn viznachiti shl

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nazvit naukovi vidkrittya yevropejskih uchenihyaki viklikali nevdovolennya katolic

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