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Ilona230
@Ilona230
July 2022
1
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спростити вираз
(1 - 1/cosa) (1+ 1/cos a)
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dtnth
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Используя формулу разности квадратов
основное тригонометрическое тождество
тригонометрическое тождество:
:
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Verified answer
Используя формулу разности квадратовосновное тригонометрическое тождество
тригонометрическое тождество:
: