найдите sin a, tg a, ctg a, если cos a = -0.4. Created by danylalebedev. algebra-ru

sin a = ± = ± = ± = ± = ± = ± = ± tg a = = ± : (- 0,4) = ± · = ± ctg a = = 1 : (± ) = 1 · (± ) = ±

найдите sin a, tg a, ctg a, если cos a = -0.4...

danylalebedev @danylalebedev

August 2022 1 11 Report

найдите sin a, tg a, ctg a, если cos a = -0.4

Answers & Comments

koktelnayavishenka

sin a = ± $\sqrt{1 - cos^{2} a}$ = ± $\sqrt{1 - (- 0,4)^{2} }$ = ± $\sqrt{1 - 0,16}$ = ± $\sqrt{0,84}$ = ± $\sqrt{\frac{84}{100} }$ = ± $\sqrt{\frac{21}{25}}$ = ± $\frac{\sqrt{21}}{5}$

tg a = $\frac{sin a}{cos a}$ = ± $\frac{\sqrt{21} }{5}$ : (- 0,4) = ± $\frac{\sqrt{21} }{5}$ · $(- \frac{10}{4})$ = ± $\frac{\sqrt{21} }{2}$

ctg a = $\frac{1}{tg a}$ = 1 : (± $\frac{\sqrt{21} }{2}$ ) = 1 · (± $\frac{2}{\sqrt{21}}$ ) = ± $\frac{2}{\sqrt{21} }$

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Answers & Comments

napishite programmu v paskale dano celoe chetyryohznachnoe chislo n i celoe chislo k

tochka e lezhit na pryamoj mezhdu tochkami p i k a tochka k prinadlezhit otrezku em pa3e50e583a1b8129ceb872c27303a1bc 39281

dano naturalnoe chislo n napisat programmu dlya vychisleniya summy vida 10152053150affba7abc988867133d0558ebe3 2812

najdite bolshij koren uravneniya 8h h 2 1b216bb2ce2005e96ec9f539df0229d79 26969

ishodnoe dannoe celoe tryohznachnoe chislo dlya h vypolnite dlya h 116 sleduyushij alg

najdite bolshij koren uravneniya 8h h 2 1

muzykalnoj harakteristiki kakogo personazha karmenhozeeskamilo net v uvertyu

poslushajte uvertyuru k opere karmenzvuchanie kakih grupp instrumentov simfoniches

zadacha uteplit kryshu bani kiramzitom 20mm tolshinoj banya 5 na 6 metrov rasschitaj

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