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murmurednadoeli
@murmurednadoeli
August 2022
1
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Упростить и вычислить без мк
1+sin18°/(sin9°+cos9°) ²
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Universalka
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murmurednadoeli
как получилось что получилось 1 и синус 18°?
Universalka
По формулам : 1) основное тригонометрическое тождество Sin²x + Cos²x = 1 ; 2) формула синуса двойного угла 2SinxCosx = Sin2x
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