- 贝贝
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sin75=sin(45+30)=sin45cos30+cos45sin30=四分之(根号六加根号二)
- 陶小凡
- wio
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约等于0.9659
- 瑞瑞爱吃桃
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sin 75° = sin(45°+30°)
=sin45°cos30° + cos45°sin30°
= (√2/2)*(√3/2) + (√2/2)*(1/2)
=(√2+√6)/4
- 里论外几
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sin75°=0.965925826
sin75=sin(45+30)=sin45cos30+cos45sin30=四分之(根号六加根号二)
约等于0.9659
sin 75° = sin(45°+30°)
=sin45°cos30° + cos45°sin30°
= (√2/2)*(√3/2) + (√2/2)*(1/2)
=(√2+√6)/4
sin75°=0.965925826