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1.Упростите выражение (sin a -2cos a)^2 + 4 sin a cos a
2.Вычислите: cos405градус - sin 330градус + tg 255градус
3.sin (pi/2 -x) +sin x Преоброзовать вырожение
4.Найти значение вырожение sin a * sin (3pi/2 +a) при a=pi/12
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Ответы 1
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3. неверный в ответе должно быть корень 2 cos (pi-x)
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Автор:
ali5tpo - 5 лет назад
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