用mathematica作方程图像问题,图像出不来
来源:学生作业帮 编辑:灵鹊做题网作业帮 分类:综合作业 时间:2024/07/04 16:13:44
用mathematica作方程图像问题,图像出不来
ContourPlot[
5.5 Sin\[Theta]*Cos\[Theta] - 1.05 (Cos\[Theta])^2 == 151.25/v^2,{v,
0,20},{\[Theta],0,\[Pi]/2}]
![](http://img.wesiedu.com/upload/f/83/f83883274a1b7f1e458a2ebf6d78d614.jpg)
不知道哪里错了,希望帮忙指正
ContourPlot[
5.5 Sinx*Cosx - 1.05 (Cosx)^2 == 151.25/v^2,{v,0,20},{x,
0,\[Pi]/2}]
ContourPlot[
5.5 Sin\[Theta]*Cos\[Theta] - 1.05 (Cos\[Theta])^2 == 151.25/v^2,{v,
0,20},{\[Theta],0,\[Pi]/2}]
![](http://img.wesiedu.com/upload/f/83/f83883274a1b7f1e458a2ebf6d78d614.jpg)
不知道哪里错了,希望帮忙指正
ContourPlot[
5.5 Sinx*Cosx - 1.05 (Cosx)^2 == 151.25/v^2,{v,0,20},{x,
0,\[Pi]/2}]
![用mathematica作方程图像问题,图像出不来](/uploads/image/z/19005992-8-2.jpg?t=%E7%94%A8mathematica%E4%BD%9C%E6%96%B9%E7%A8%8B%E5%9B%BE%E5%83%8F%E9%97%AE%E9%A2%98%2C%E5%9B%BE%E5%83%8F%E5%87%BA%E4%B8%8D%E6%9D%A5)
函数的参数要用方括号,所以你的Sinx,Cosx要改为Sin[x],Cos[x],见下面:ContourPlot[
5.5 Sin[x]*Cos[x] - 1.05 (Cos[x])^2 == 151.25/v^2, {v, 0, 20}, {x,
0, \[Pi]/2}]![](http://img.wesiedu.com/upload/e/12/e1241d3700651477de0c9a2c709f1c21.jpg)
5.5 Sin[x]*Cos[x] - 1.05 (Cos[x])^2 == 151.25/v^2, {v, 0, 20}, {x,
0, \[Pi]/2}]
![](http://img.wesiedu.com/upload/e/12/e1241d3700651477de0c9a2c709f1c21.jpg)