I assume that with "modulus" you mean the absolute value. Start by graphing:
y = cot x
Remove negative values of the function value, since those can't be satisfied by the equation. You will also need to reflect the resulting function along the x-axis.
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On your graph paper, after you draw and number the 'x' and 'y' axes, draw a straight linethat goes through the point [ y = 2 ] on the y-axis, and has a slope of [ 0.5 ).
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solve for y so if x + y = 0 then y = -x