Задача 75029 Доказать тождество sin a /1-cos a = 1 +...

6585b81ef927987e77b37b15

12/22/2023 4:39:33 PM

Доказать тождество sin a /1-cos a = 1 + cos a / sin a

6585beb9f927987e77b37b26

12/22/2023 4:56:29 PM

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sin(a) / (1 - cos(a)) = (1 + cos(a)) / sin(a), sin(a) * (1 - cos(a)):
sin(a) * sin(a) = (1 + cos(a)) * (1 - cos(a))
sin²(a) = 1 - cos²(a)
sin²(a) = sin²(a)