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алеша22869
@алеша22869
August 2022
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Докажите тождество:
Sin^4+sin^2*cos^2+cos^2=1
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Verified answer
Sin⁴ x + sin² x cos² x + cos² x = 1
Используем равенство sin² x + cos² x = 1
Тогда sin⁴ x + sin² x (1 - sin² x) + cos² x = 1
sin⁴ x + sin² x - sin⁴ x + cos² x = 1
sin² x + cos² x = 1 => 1 ≡ 1.
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Answers & Comments
Verified answer
Sin⁴ x + sin² x cos² x + cos² x = 1Используем равенство sin² x + cos² x = 1
Тогда sin⁴ x + sin² x (1 - sin² x) + cos² x = 1
sin⁴ x + sin² x - sin⁴ x + cos² x = 1
sin² x + cos² x = 1 => 1 ≡ 1.