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amsterdam1805
@amsterdam1805
July 2021
1
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помогите представить с помощью формул приведения.
2cos^2150*
3sin(-90)
5ctg135*
где
*-это градус
^2 корень в квадрате.
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GAHrad
2 cos²150 = 2 cos (90 + 60) = 2 (- sin 60) = 2 (√3/2)² = 3/2
3 sin (-90) = - 3 sin 90 = -3
5 ctg (90 + 45) = 5 (- tg 45) = - 5
4 votes
Thanks 6
amsterdam1805
Спасибо вам огромное !!!!!!!!!!
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Answers & Comments
3 sin (-90) = - 3 sin 90 = -3
5 ctg (90 + 45) = 5 (- tg 45) = - 5