She called Leo.
“Okay,” he said. “Now close the PDF. Take a plate. Draw a circle. Mark 0°, 90°, 180°, 270°. Then figure out why sin(30°)=0.5 without looking.” myp mathematics 4 amp-5 standard pdf
The vector question: “Find the angle between vectors a = (3,4) and b = (1,2).” She called Leo