化简(sin15 °+cos15°)2
问题描述:
化简(sin15 °+cos15°)2
答
=[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
=[根号2乘以2分之根号2(sin15+cos15)]2=2*[sin(15+45)]2=2*(3/4)=3/2.