sin9°cos15°-sin24°/sin9°sin15°+cos24°的值为___
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sin9°cos15°-sin24°/sin9°sin15°+cos24°的值为___sin9°cos15°-sin24°/sin9°sin15°+cos24°的值为___sin9°cos15°-si
sin9°cos15°-sin24°/sin9°sin15°+cos24°的值为___
sin9°cos15°-sin24°/sin9°sin15°+cos24°的值为___
sin9°cos15°-sin24°/sin9°sin15°+cos24°的值为___
sin9°cos15°-sin24°/sin9°sin15°+cos24°
=sin9°cos15°-sin(9°+15°)/sin9°sin15°+cos(9°+15°)
=sin9°cos15°-sin9°cos15°-cos9°sin15°/sin9°sin15°+cos9°cos15°-sin9°sin15°
=-cos9°sin15°/cos9°cos15°
=-tan15°
≈-0.268
0.3917083927
求值(sin9°cos15°-sin24°)/(sin9°sin15°+cos24°)
sin9°cos15°-sin24°/sin9°sin15°+cos24°的值为___
cos15°sin9°+sin6°/sin15°sin9°—cos6°=
sin6°+cos15°sin9°/cos6°-sin15°sin9°
求值.（cos15°*sin9°+sin6°）/（sin15°*sin9°-cos6°）
(cos15°sin9°+sin6°)/(sin15°sin9°-cos6°)=
求值:(sin9°+sin6°cos15°)/(cos9°-sin6°sin15°)怎么做? 过程!
计算：(sin9°+cos15°sin6°)÷(cos9°-sin15°sin6°)
计算三角函数(和角公式)sin9°+sin6°cos15°/cos9°-sin6°sin15°
化简√(1-2sin24°cos24°)+sin24°
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化简sin15°-cos15°/sin15°+cos15°
(sin15°－cos15°)/(sin15°+cos15°)=