How can ı solve this triangle problem at MATLAB?

In the triangle which has edges names:a,b,c; a=9 b=18 c=25 how can ı calculate the alfa(the angles sees a) with the law of cosines? with MATLAB

[James Tursa]

What have you done so far? What specific problems are you having with your code? Do you know how to code the law of cosines?

[Mesut Anlak]

yes ı know the basics and of course law of cosines

[Mesut Anlak]

ı just cant understand how ı can find the angle

ı can find the value of cos(x) but not x

Answer 1

[James Tursa]

If you can find cos(x), you might look at feeding that into the acos( ) function to recover x.

[Mesut Anlak]

The program gives me radiant but the question wants angle

[James Tursa]

If you want an angle in degrees, you can use the acosd( ) function.

[Steven Lord]

Hint: one of the functions listed in the "See Also" section at the end of the documentation page for the acos function will be of use to you.

[Mesut Anlak]

thanks guys ı solved thanks to you :)