Помогите, оч срочно нужно
Упростите выражение
Sin(45+альфа) + cos(45+альфа) /sin(45+альфа) -cos(45+альфа)
Найти значение выражения
Sin^2*Π/13+cos^2*Π/13-(cos^2*Π/12-sin^2*Π/12)^2
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