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RaceTaRaN
@RaceTaRaN
July 2022
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№1 Найдите значение выражения:
√27 sin (-60°)+4 cos (-60°)-tg (-45°)
№2 Вычислите:
2 sin 390°-5 cos 420°-10 tg 720°
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Answers & Comments
Keelat
1) √27 * (-sin60) + 4cos60 + tg45 = √27 * (-
√3\2) + 2 + 1 = -4.5 + 3 = -1.5
2) 2sin(360+30) - 5cos(360+60) - 10tg720 = 2sin30 - 5cos60 - 0 = 1 - 2.5 = -1.5
3 votes
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RaceTaRaN
спасибо больше
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Answers & Comments
2) 2sin(360+30) - 5cos(360+60) - 10tg720 = 2sin30 - 5cos60 - 0 = 1 - 2.5 = -1.5