1+ctg(п+2)*tg(3п/2-α)=

Question

1+ctg(п+2)*tg(3п/2-α)=

Comments

п+2 или п+а?

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альфа

Answer 1

1+ctg(п+α)*tg(3п/2-α)=1+сtgα·ctgα=1+ctg²α=1/sin²α