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PolinaDel
@PolinaDel
August 2021
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Хочу проверить ответ,будет 1-корень из 3/2 ?
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Answers & Comments
m11m
1) sin (17π/6) = sin (
12π
+
5π
) = sin(2π +
5π)
= sin
5π
=
6 6 6 6
= sin(π -
π)
= sin (π/6) = 1/2
6
2) cos(-55π/6) = cos(55π/6) = cos (
60π
-
5π
) = cos(10π -
5π
) =
6 6 6
= cos (2π*5 -
5π
) = cos
5π
= cos (π -
π)
= -cos (π/6) =
-√3
6 6 6 2
3)
1
-
√3
=
1-√3
2 2 2
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Answers & Comments
6 6 6 6
= sin(π - π) = sin (π/6) = 1/2
6
2) cos(-55π/6) = cos(55π/6) = cos (60π - 5π) = cos(10π - 5π) =
6 6 6
= cos (2π*5 - 5π) = cos 5π = cos (π - π) = -cos (π/6) = -√3
6 6 6 2
3) 1 - √3 = 1-√3
2 2 2