How to add integral in a integral function

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I need to add an complex integral inside of a integral function like this:
integral(@(x)sin(integral(@(a)sin(a),0,x)),0,1)
However, it turns out to be an error with message: “Limits of integration must be double or single scalars.”
P.S. My function is much complex than 'sin(x)', here just is an example.
How to solve this?

Accepted Answer

Torsten
Torsten on 30 Nov 2022
Edited: Torsten on 30 Nov 2022
format long
integral(@(x)sin(integral(@(a)sin(a),0,x)),0,1,'ArrayValued',true)
ans =
0.156096097878724
integral(@(x)sin(1-cos(x)),0,1)
ans =
0.156096097878724

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