Help!: int(expr,var) function returns the int(expr,var) function
1 回表示 (過去 30 日間)
古いコメントを表示
Daniel Møgelbjerg
2021 年 4 月 16 日
コメント済み: Daniel Møgelbjerg
2021 年 4 月 20 日
When i try to make a fucntion described by two indefinite integrals, one of the indefinite integrals returns without being solved.
The variable x an angle between 0 and pi/2.
F_1 is a force.
R_1 and R_2 are lenghts.
%% Variables
syms x;
F_1 = 200; %N
R_1 = 30; % mm
L = 40; % mm
H = 20; % mm
R_2 = 20*(4*cos(x)^2 + sin(x)^2)^(1/2);
%% Equations
m_1(x)= F_1*sin(x)*R_1;
md_1(x)=sin(x)*R_1;
m_2(x)=F_1*R_2*cos(x);
md_2(x)=R_2*cos(x);
ex_1=R_1*m_1(x)*md_1(x);
ex_2=simplify(R_2*m_2(x)*md_2(x))
%% Integration
f(x)=int(ex_1,x) + int(ex_2,x)
f(x) =
2700000*x - 1350000*sin(2*x) - int(1600000*(4 - 3*sin(x)^2)^(3/2)*(sin(x)^2 - 1), x) - It should solve this one, but indstead it just spit out int(expresion,var) just as it was inserted.
0 件のコメント
採用された回答
Cris LaPierre
2021 年 4 月 17 日
That likely means it couldn't solve that one.
Consider using one of the techniques mentioned in these two examples.
その他の回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Calculus についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!