Ответ:
Объяснение:
cos(π-α)*tg(π+α)/sin(π/2-α)=-cosα*tgα/cosα=-sinα/cosα=-tgα.
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Ответ:
Объяснение:
cos(π-α)*tg(π+α)/sin(π/2-α)=-cosα*tgα/cosα=-sinα/cosα=-tgα.