issue with sequaring sec of matrix

Dear all

Please I need help with an issue of secuaring every sec(Phi)which i need in a part of my code

Phi=0:(2*pi)/360:(340*pi)/180;
ff=sec(Phi).^2

the resulted matrix has all its elements zeros that multiplied in e+33

your help is higly appreciated

[Walter Roberson]

Your code would probably be clearer if you used linspace() instead of an increment.

Are you trying to work in degrees or radians? What is your maximum value in radians ?

[Abdulaziz]

I want to work in radians and the angle Phi varies from zero to 340

I am trying to find the x values where x=17.5/cos^2(phi) .All the values of x I got are zeros which is wrong but the first element of x was right (17.5)

Thank you for your concern

Answer 1

[Walter Roberson]

At the command prompt give the command

format long g

and then have another look at the values in ff.