Solve a numerical equation

Hi everyone,

I have a problem solving a numerical equation. I want the result near zero for:

((1/6)*abs(sin(x*6/2)/sin(x/2))) = 1/sqrt(2)

It should be around x = 0.4695;

I tried the following:

myfunc = @(x) ((1/6)*abs(sin(x*6/2)/sin(x/2)))-1/sqrt(2);
x0 = 0;
fzero(myfunc,x0);

But somehow doesn't work for me. Can somebody help me please and tell me why it doesn't work?

Thanks.

Answer 1

[Stephan]

Hi,

use another x0:

myfunc = @(x) ((1/6)*abs(sin(x*6/2)/sin(x/2)))-1/sqrt(2);
x0 = 1;
fzero(myfunc,x0);

This will make it work.

Best regards

Stephan

Answer 2

[madhan ravi]

x0 = 1;

Answer 3

[Torsten]

x0 = 0 leads to a divison by zero since sin(x0/2) = sin(0) = 0