(ρ,θ)→(x,y)
x=ρcosθ
y=ρsinθ怎么和你说呢f(ρ,θ)=0→g(x,y)=0.x=ρcosθy=ρsinθ 你给我一个方程吧θ=arctan(y/x)ρ=x^2+y^2所以x^2+y^2=sin(arctan(y/x)+π/3)=(y+√3 x)/(2√(x^2+y^2))(x^2+y^2)^1.5=y/2+√3 x/2sin(θ+π/3)=0.5sinθ+0.5√3 cosθ =0.5[√(1-cos^2 θ)+√(3cos^2 θ)] =0.5[√(1-1/(1+tan^2 θ))+√(3/(1+tan^2 θ))]tan^2 θ=y^2/x^2带入化简 =(y+√3 x)/(2√(x^2+y^2))做错了ρ=√(x^2+y^2)
猜你喜欢
- 1They began to work instead to make life better .这个句子如何理解,instead 后加to do .还是doing
- 2Lim(arctanx/x)的值x趋向无穷大
- 3改错:She enjoys to play football.
- 4齿数分别为84,36,60和48的四个齿轮互相啮合的各齿到下一次再同时啮合,各齿轮分别
- 5已知函数f(x)是定义在R上的偶函数,当x≥0时,f(x)=x(x+1).画出函数f(x)的图像,并求出函数的解析式
- 6It's going ti rain,so you'd better __an umbrella with you
- 7求一到十二月的英文缩写?
- 8算一个数学题 哈哈 [(3x+4y)2-3x(3x+4y)]/(-4y)
- 9The panda likes to eat bamboo,___it eats leaves too.是填and还是but为什么?
- 10定义域和值域均为[-a,a](常数a>0)的函数y=f(x)和y=g(x)的图象如图所示,给出下列四个命题: ①方程f[g(x)]有且仅有三个解; ②方程g[f(x)]有且仅有三个解; ③方程f[f(x)]有且