1.根号3cosa+sina 2.-sina+根号3cosa 3.cosa-根号sina

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/11 04:07:22

1.√3cosa+sina
=2(√3/2•cosa+1/2•sina)
=2[sin(π/3)•cosa+cos(π/3)•sina]
=2sin(π/3+a)
或：√3cosa+sina
=2(√3/2•cosa+1/2•sina)
=2[cos(π/6)•cosa+sin(π/6)•sina]
=2cos(π/6-a)
2.-sina+√3cosa
=√3cosa-sina
=2(√3/2•cosa-1/2•sina)
=2[sin(π/3)•cosa-cos(π/3)•sina]
=2sin(π/3-a)
或：-sina+√3cosa
=√3cosa-sina
=2(√3/2•cosa-1/2•sina)
=2[cos(π/6)•cosa-sin(π/6)•sina]
=2cos(π/6+a)
3.cosa-√3•sina
=2(1/2•cosa-√3/2•sina)
=2[cos(π/3)•cosa-sin(π/3)•sina]
=2 cos(π/3+a)
或cosa-√3•sina
=2(1/2•cosa-√3/2•sina)
=2[sin(π/6)•cosa-cos(π/6)•sina]
=2sin(π/6-a)

1.根号3cosa+sina 2.-sina+根号3cosa 3.cosa-根号sina 已知sina+cosa=根号3/2 求sina-cosa sina+cosa=根号3/3(0 cosA-根号3sinA 如何化简化简：sina+_（根号3)cosa 化简 1/2sina+根号3/2cosa 根号2/2sina-根号2/2cosa (1+sina+cosa)(sina/2+cosa/2)(1+sina+cosa)(sina/2+cosa/2)除以根号 2sinA^2+1/2cosA+根号3/2sinA 已知sinA+cosA/sinA-cosA=3+2根号2,求sinAcosA和sinA+cosA的值化简cosa*根号下(1-sina/1+sina)+sina*根号下（1-cosa/1+cosa）化简：cosa根号(1-sina/1+sina)+sina根号(1-cosa/1+cosa) 三角函数 SINA+COSA=根号2 求SINA和COSA