sin9°cos15°-sin24°/sin9°sin15°+cos24°的值为___

来源：学生作业帮编辑：搜狗做题网作业帮分类：数学作业时间：2024/05/29 12:42:04

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

求值(sin9°cos15°-sin24°)/(sin9°sin15°+cos24°) cos15°sin9°+sin6°/sin15°sin9°—cos6°= 求值:(sin9°+sin6°cos15°)/(cos9°-sin6°sin15°) 化简（sin15°cos9°-cos66°）/（sin15°sin9°+sin66°）的结果是? sin6+cos15*sin9/cos6-sin15*sin9 （Sin15Cos9°—Cos66°）/（Sin15°Sin9°+Sin66°）可以化简为?要过程化简COS8°-SIN17°SIN9°/COS9° tan15°+cos15°/sin15°的值求详解求sin15°+tan30°cos15°的值求cos15°-tan15°/cos15°+sin15° cos75°cos15°+sin75°sin15°的值为（　　）化简：（cos15度sin9度+sin6度）/（sin15度sin9度-cos6度）