Автор - kisaoo

(cos^2-sin^2)корень из 1-x^2=0

Ответ

Автор - irabodrova2010
cos²x-sin²x=0
cos²=√1-sin²
1-sin²-sin²=0
1-2sin²=0
2sin²=1
sin²x=1/2
x=+-√1/2
x=+-√2/2
x=π/4+πk
√1-x²=0
1-x²=0
x³=1
x=+-√1

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