calculate the sin of vect1 and display in degrees (not radians)

I want calculate the sin of vect1 and display them in degrees(not radians)，below is my codes, I am not sure it is right or not. Am I right? Is there better codes?

vect1=[1 2 4 6 3];
n1=sin(vect1);
for i=1:5
  n1(1,i)=(i./(2.*pi)).*360;
end
disp('the sin of vect1 in degree is:');
disp(n1);

[Sainan Shi]

and I have one more question : whether and how the command pi will make this more accurate?

Based the codes:

vect1=[1 2 4 6 3];
n1 = sind(vect1);
disp('the sin of vect1 degrees is:');
disp(n1);

the output is:

0.0175    0.0349    0.0698    0.1045    0.0523

But I saw the information:' For integers n, sind(n*180) is exactly zero, whereas sin(n*pi) reflects the accuracy of the floating point value of pi '

And if I use the command pi, like this:

vect1=[1 2 4 6 3];
n1 = sind(vect1*pi);
disp('the sin of vect1 degrees is:');
disp(n1);

the output is:

0.0548    0.1094    0.2176    0.3231    0.1638

the two output is different ,what is wrong? How can I use the command pi correctly ?

Answer 1

[Walter Roberson]

vect1=[1 2 4 6 3];
n1 = sind(vect1);
disp('the sin of vect1 degrees is:');
disp(n1);

[Sainan Shi]

Thanks, and I have one more question : whether and how the command pi will make this more accurate?

Based on your codes, the output is:

0.0175    0.0349    0.0698    0.1045    0.0523

But I saw the information:' For integers n, sind(n*180) is exactly zero, whereas sin(n*pi) reflects the accuracy of the floating point value of pi '

And if I use the command pi, like this:

vect1=[1 2 4 6 3];
n1 = sind(vect1*pi);
disp('the sin of vect1 degrees is:');
disp(n1);

the output is:

0.0548    0.1094    0.2176    0.3231    0.1638

the two output is different ,what is wrong? How can I use the command pi correctly ?

[Stephen23]

If you want to use sin (and not sind) then you need to convert from degrees to radians:

>> sin(pi*vect1/180)
ans =
     0.017452     0.034899     0.069756      0.10453     0.052336

But if those values are already in degrees then there is no point in converting them to radians for this caculation.

[Walter Roberson]

Compare

sind(vect1*180)
sin(vect1*pi)