化简求值:5/18-5/9(sin15°)^2
(cos15°-cos75°)(sin75°+sin15°)怎么化简?
sin15°
(Sin15Cos9°—Cos66°)/(Sin15°Sin9°+Sin66°)可以化简为?要过程
求值(sin9°cos15°-sin24°)/(sin9°sin15°+cos24°)
求值:(sin9°+sin6°cos15°)/(cos9°-sin6°sin15°)
(sin7°+cos15°cos8°)/(sin7°-sin15°sin8°)的化简
化简求值(求值)
sin15°cos165°的值是( )
化简(sin15°cos9°-cos66°)/(sin15°sin9°+sin66°)的结果是?
sin15°乘sin75°
sin15°sin75°=?
sin15°+cos165°=