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reygenn
@reygenn
September 2021
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dnepr1
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4) sin(-600°) = -sin 600° = -sin(600-2*360°) = -sin(-120°) = sin 120° = √3/2
-2√3*(√3/2) = -3.
6) -2√3cos(-19π/6) = -2√3cos((-19π/6)+2π) = -2√3cos((-7π/6) =
= -2√3cos((π + π/6) = -2√3*(-cos(π/6)) = 2√3*(√3/2) = 3.
5) В этой задаче ответ равен 3.
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Answers & Comments
Verified answer
4) sin(-600°) = -sin 600° = -sin(600-2*360°) = -sin(-120°) = sin 120° = √3/2-2√3*(√3/2) = -3.
6) -2√3cos(-19π/6) = -2√3cos((-19π/6)+2π) = -2√3cos((-7π/6) =
= -2√3cos((π + π/6) = -2√3*(-cos(π/6)) = 2√3*(√3/2) = 3.
5) В этой задаче ответ равен 3.