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kristishka1111
@kristishka1111
August 2022
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2sin 120 + 4cos 150 - 2tg 135
значення знайти
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2Sin120° + 4Cos150° - 2tg135° = 2Sin(90 + 30) + 4Cos(180 - 30) - 2tg(90 + 45) = 2Cos30° - 4Cos30° + 2ctg45° = - 2 * √3/2 + 2 * 1 = 2 - √3
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Verified answer
2Sin120° + 4Cos150° - 2tg135° = 2Sin(90 + 30) + 4Cos(180 - 30) - 2tg(90 + 45) = 2Cos30° - 4Cos30° + 2ctg45° = - 2 * √3/2 + 2 * 1 = 2 - √3