化简(sin15 °+cos15°)2
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化简(sin15 °+cos15°)2
化简(sin15 °+cos15°)2
化简(sin15 °+cos15°)2
=[根号2乘以2分之根号2(sin15+cos15)]2=2*[sin(15+45)]2=2*(3/4)=3/2.
化简(sin15 °+cos15°)2
化简sin15°-cos15°/sin15°+cos15°
化简sin15°-cos15°/sin15°+cos15°
化简:sin15°*cos15°
化简sin15°-√3cos15°(过程)
cos15°^2-sin15°^2
2sin15°cos15°= ?
2sin15° cos15°=
化简﹙cos15°-sin15°﹚÷﹙cos15°+sin15°﹚
求(sin15°-cos15°)/(sin15°+cos15°)的值
(sin15°+cos15°)(sin15°-cos15°)的值为?
(sin15°+ cos15°)/(sin15°- cos15°)的值是
(sin15°-cos15°)/(sin15°+cos15°)=
sin15°-cos15°/sin15°+cos15°的值?
sin15°-cos15°/sin15°+cos15°的值?
sin15°cos15°等于
sin15°+cos15°过程
sin15°cos15°等于?