set xlabel 'alpha 1'
set ylabel 'delta'

plot [0:3.14] 1.0 * cos(x) + 2.0 * sin(x) title 'f_p1'
replot 2.0 * cos(x) + 3.0 * sin(x) title 'f_p2'
replot 3.0 * cos(x) + 4.0 * sin(x) title 'f_p3'
replot 4.0 * cos(x) + 5.0 * sin(x) title 'f_p4'
replot 6.0 * cos(x) + 7.0 * sin(x) title 'f_p5'
replot 7.0 * cos(x) + 2.0 * sin(x) title 'f_p6'
replot 1.0 * cos(x) + 5.0 * sin(x) title 'f_p7'