(sin15°+cos15°)(sin15°-cos15°)的值为?
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(sin15°+cos15°)(sin15°-cos15°)的值为?(sin15°+cos15°)(sin15°-cos15°)的值为?(sin15°+cos15°)(sin15°-cos15°)的值
(sin15°+cos15°)(sin15°-cos15°)的值为?
(sin15°+cos15°)(sin15°-cos15°)的值为?
(sin15°+cos15°)(sin15°-cos15°)的值为?
原式=sin15^2-cos15^2=1-2*cos15^2=-cos30=-√3/2
(负的根号下3)/2
化简(sin15 °+cos15°)2
求(sin15°-cos15°)/(sin15°+cos15°)的值
(sin15°+cos15°)(sin15°-cos15°)的值为?
(sin15°+ cos15°)/(sin15°- cos15°)的值是
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°=
化简sin15°-√3cos15°(过程)