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SansFox
@SansFox
July 2022
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Докажите тождество. Смотрите фото в приложении. :'(
Ctg²(п/2+а)-cos²(п/2-а) / ctg²(п/2-а)-cos²(п/2+а) =1
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belozerova1955
По формулам приведения:
(-tgα)² -(sinα)² tg²α - sin²α
----------------------- = ------------------- = 1
(tgα)² - (-sinα)² tg²α - sin²α
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(-tgα)² -(sinα)² tg²α - sin²α
----------------------- = ------------------- = 1
(tgα)² - (-sinα)² tg²α - sin²α