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dasha200025
@dasha200025
June 2021
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найдите значения синуса, косинуса, и котангенса угла, танненс которого равен 1
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Vlanny02
Tgα = 1
ctgα = 1/tgα = 1
tg²α + 1 = 1/cos²α
cos²α = 1/(1 + tg²α) = 1/(1 + 1) = 1/2
cosα = 1/√2 или cosα = - 1/√2
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Answers & Comments
ctgα = 1/tgα = 1
tg²α + 1 = 1/cos²α
cos²α = 1/(1 + tg²α) = 1/(1 + 1) = 1/2
cosα = 1/√2 или cosα = - 1/√2