wind_vel := vector([ -50*sin(Pi/4), 50*cos(Pi/4) ]); deg60 := convert(60*degrees,radians); airspeed := vector([ 250*sin(deg60), 250*cos(deg60) ]); track := evalm(wind_vel + airspeed); evalf(evalm(track),5); ground_speed := norm(evalm(track),2); evalf(",5);