2sin15°*4cos15°怎么化简
(cos15°-cos75°)(sin75°+sin15°)怎么化简?
求cos15°-tan15°/cos15°+sin15°
(sin7°+cos15°cos8°)/(sin7°-sin15°sin8°)的化简
(cos15°-cos75°)(sin75°+sin15°)=?
tan15°+cos15°/sin15°的值 求详解
求sin15°+tan30°cos15°的值
根号6倍的sin15°+根号2倍的cos15°=什么
sin15+cos15为什么等于 根号2*sin60?
1.sin7°+cos15°sin8°/cos7°-sin15°cos8°=
求值(sin9°cos15°-sin24°)/(sin9°sin15°+cos24°)
tan15°、tan75°sin15°、sin75°、cos15°cos75°具体数值
cos15°sin9°+sin6°/sin15°sin9°—cos6°=