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nastyapetrova011
@nastyapetrova011
July 2022
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Вычислить sin 135 c
Cos 150 c
Sin 120 c
Cos 240 c
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sharadi
Вычислить:
Sin 135
° = Sin(180° - 45°) = Sin45° = √2/2
Cos 150
°
= Cos(180
°
- 30
°
) = - Cos30
°
= -
√3/2
Sin 120
° = Cos(180° - 60°) = - Cos60° = -1/2
Cos 240
°= Cos(180° + 60°) = - Cos60°= -1/2
Все примеры на формулы приведения.
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Answers & Comments
Sin 135° = Sin(180° - 45°) = Sin45° = √2/2
Cos 150° = Cos(180° - 30°) = - Cos30°= -√3/2
Sin 120° = Cos(180° - 60°) = - Cos60° = -1/2
Cos 240°= Cos(180° + 60°) = - Cos60°= -1/2
Все примеры на формулы приведения.