(sin15°+ cos15°)/(sin15°- cos15°)的值是
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![(sin15°+ cos15°)/(sin15°- cos15°)的值是](/uploads/image/z/3709920-48-0.jpg?t=%28sin15%C2%B0%2B+cos15%C2%B0%29%2F%28sin15%C2%B0-+cos15%C2%B0%EF%BC%89%E7%9A%84%E5%80%BC%E6%98%AF)
(sin15°+ cos15°)/(sin15°- cos15°)的值是
(sin15°+ cos15°)/(sin15°- cos15°)的值是
(sin15°+ cos15°)/(sin15°- cos15°)的值是
原式=(sin15°)²-(cos15°)²=-cos30°=-2分之根号3
原式=sin15^2-cos15^2=1-2*cos15^2=-cos30=-√3/2 望采纳。。。。。。
尼玛的,自己回去看书
化简sin15°-cos15°/sin15°+cos15°
(sin15°-cos15°)/(sin15°+cos15°)=
sin15°-cos15°/sin15°+cos15°的值?
化简sin15°-cos15°/sin15°+cos15°
sin15°-cos15°/sin15°+cos15°的值?
sin15°cos15°等于
sin15°+cos15°过程
sin15°cos15°等于?
化简:sin15°*cos15°
cos15°-sin15°=?
sin15°cos15°=
sin15°cos15°是什么意思
sin15°+cos15°=
求cos15°-tan15°/cos15°+sin15°
化简(sin15 °+cos15°)2
sin15°=?cos15°=?
求sin15°+cos15°的值
sin15°cos15°怎么算