While loop homework problem

For any number between -1 and 1, your program calculates and outputs the arccosine and arcsine of the number in both degrees and radians. (Example: if you enter 0, arccosine is either 90 degrees or π/2 radians, and 270 degrees or 3π/2 radians.) For your convenience, your answers can be between 0 and 180 degrees (π).

This is what I've been doing. I know its wrong...The thing is it has to be like beginner MATLAB level language. i=-1;

while i<=1

i=asin(i)

i=asind(i)

i=acos(i)

end n=-1

[William]

Bye the way it is bad to use "i" as variables in Matlab because it thinks "i" or "j" as the square root of -1 (Imaginary number)

Answer 1

[Harry MacDowel]

I felt a bit bored so I do the coding for you. Also I might have use for this in near future. Just run arcCosSin in command window.

Next time try a bit harder to do the homework yourself. You could get a lot of Matlab programming tips through Google.

function [] = arcCosSin()
  % Written by GLO on 11.Oct.2011

inputnum = input('Please Enter a number between -1 and 1 for the arcCos and arcSin: ');

if (inputnum<-1 || inputnum>1)
    fprintf('\nThis program only gives the answer for input between -1 and 1\n');
else
    sinDeg = asind(inputnum);
    sinRad = asin(inputnum);

      cosDeg = acosd(inputnum);
      cosRad = acos(inputnum);

      fprintf('ArcSin in Degree is: %0.2f\n',sinDeg);
      fprintf('ArcSin in Radian is: %0.5f\n',sinRad);
      fprintf('ArcCos in Degree is: %0.2f\n',cosDeg);
      fprintf('ArcCos in Radian is: %0.5f\n',cosRad);
  end

[Jan]

For unknown reasons the OP wants a WHILE loop.

[Harry MacDowel]

Yeah Jan. But then when I looked at the statement of the homework again, it didn't say anything about while loop so I am thinking, maybe it's just Tamimi who thinks that he needs while loop to solve this question.

But then it's not hard to alter either. ;-)

[Abdullah Tamimi]

i could actually use if/else/elseif also. sorry my teacher wrote the book for the class and he didnt tell us how to do this

[Harry MacDowel]

so does the code fit your objectives?

[Abdullah Tamimi]

It does, but too well...

I tried rewriting it so it fits what my teacher is looking for, but im pretty sure im doing something wrong

if (x<-1 || x>1)

else

x=asind(x)

x=asin(x)

x=acosd(x)

x=acos(x)

end

[Harry MacDowel]

if (x<-1 || x>1)

(you have to tell the program what to do here)

else

[Abdullah Tamimi]

wait i have to tell it to do all those cos and sin functions. what do i put heeeeeeelppppppp

Answer 2

[William]

for ii = -1:0.001:1
   asind(ii)
   asin(ii)
   acosd(ii)
   acos(ii)
end

[Abdullah Tamimi]

but it sort of doesnt correctly answer the question, it asks for you to enter a number to get an answer, not to get a list of all answers