how do I write expression for this equation??

e ^x + 2^−x + 2 cos x − 6 = 0

[Rik]

You must have tried something? What was it?

Answer 1

[Cris LaPierre]

See Ch 2 of MATLAB Onramp

Answer 2

[Sam Chak]

Hi @manar zuhair

I understand the frustration of a beginner. However, since you didn't provide much info, I can only guess and hope that they will be helpful to you in exploring what you want to learn. Some people may just want to solve the problem in the assignment for the sake of passing the coursework.

If you want to solve the nonlinear equation, then use fsolve.

https://www.mathworks.com/help/optim/ug/fsolve.html

If you want to plot the nonlinear function, then learn how to plot here:

https://www.mathworks.com/help/matlab/ref/plot.html

When you have free time after solving the problem, try taking up the MATLAB Onramp courses as suggested by @Cris LaPierre.