Math, asked by saligia, 10 hours ago

Найти знак уравнения
cos13π/15 • ctg 23π/18

Answers

Answered by daniilrocks987

1

Answer:
-
Step-by-step explanation:
cos(13pi/15) = -.9
Cos(23/18 pi) = -.64
Sin(23pi/18) = -.77
Cot(23pi/18)=-.64/-.77=.84
.84*-.9=-.76

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