化简﹙cos15°-sin15°﹚÷﹙cos15°＋sin15°﹚

求cos15°-tan15°/cos15°+sin15° (cos15°-cos75°)(sin75°+sin15°)＝? tan15°+cos15°/sin15°的值 求详解 求sin15°+tan30°cos15°的值 sin15°cos^315°-cos15°sin^315°化简 1.sin7°+cos15°sin8°/cos7°-sin15°cos8°= 求值(sin9°cos15°-sin24°)/(sin9°sin15°+cos24°) (sin7°+cos15°cos8°)/(sin7°-sin15°sin8°)的化简 tan15°、tan75°sin15°、sin75°、cos15°cos75°具体数值 cos15°sin9°+sin6°/sin15°sin9°—cos6°= 求值:(sin9°+sin6°cos15°)/(cos9°-sin6°sin15°) 求cos25°cos15°-cos75°sin15°解答过程