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Gufjfg
@Gufjfg
August 2022
1
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Найдите ctg a, если cos a= -0.6 и Пи<а<3Пи/2.
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skyne8
Verified answer
Ctga=cosa/sina, cosa=-0,6,
sina= -√(1-(cosx)^2)=-√(1-0,36)=
=-√0.64=-0,8
ctga=(-0,6)/(-0,8)=3/4
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Answers & Comments
Verified answer
Ctga=cosa/sina, cosa=-0,6,sina= -√(1-(cosx)^2)=-√(1-0,36)=
=-√0.64=-0,8
ctga=(-0,6)/(-0,8)=3/4