Nice work As a teacher, what would help make this really useful on (say) an interactive whiteboard would be 1) On/off by the functions on the bottom left so t

Nice work As a teacher, what would help make this really useful on (say) an interactive whiteboard would be 1) On/off by the functions on the bottom left so that I can focus on (say) the sin function, then switch the cosine function on, then challenge students to say what happens to sin/cos for various angles then switch on the tan function 2) Line width control or just thicker 3) Switchable angle overlays (degrees for most, radians only for the advanced ones) Thanks