用mathematica作方程图像问题,图像出不来
来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/07/03 15:42:30
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}]
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)