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Bella13
@Bella13
July 2022
1
28
Report
Вычислите
значение выражения 13cos
(π/2 – α),
если cos
α
= 12/13
и α принадлежит (-
π/2;0). Ответ должен быть -5.
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Answers & Comments
alexnest87
Cos(π/2 -a)= sin(a)=
13cos(π/2 - a) = 13
= 13*5/13=5
5 votes
Thanks 16
Bella13
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Answers & Comments
13cos(π/2 - a) = 13= 13*5/13=5