Make up a table with columns headed by values of running from -/2 to 2 in

Make up a table with columns headed by values of θ running from -π/2 to 2π in intervals of π/4. In each column place the corresponding value of sin θ, and beneath those the values of sin (θ - π/2). Next add these, column by column, to yield the corresponding values of the function sin θ + sin (θ - π/2). Plot each of these three functions, noting their relative amplitudes and phases.