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