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Supabadazz
@Supabadazz
May 2022
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Вычислить:
а) √3 sin60° + cos60°sin30° -tg45°ctg135°+ctg90°
б) на скриншоте
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gems5676
Ответ:а ) √3 sin 60+cos 60 * sin 30 – tg 45 * ctg 135 +ctg 90 = √3 * √3/2 + 1/2 * 1/2 - 1 * ctg (90 + 45) + 0 = 3/2 + 1/4 - (- tg 45) = 6/4 + 1/4 + 1 = 7/4 + 1 = 7/4 + 4/4 = 11/4 = 2,75;б ) Cos пи/6 -√2 * sin Пи/4+√3 * tgПи/3 = √3/2 - √2 * (√2)/2 + √3 * √3 = √3/2 - 2/2 + 3 = √3/2 - 1 + 3 = √3/2 + 2.Ответ : а ) 2,75; б ) √3/2 + 2.
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Supabadazz
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