Trigonometric graphs - Higher This circle has the centre at the origin and a radius of 1 unit. The point P can move around the circumference of the circle.

Part of that is the way it's taught. Students are taught the "unit circle" and its relationship to trigonometry, but many fail to make the leap on how crucial circles are for trig functions. With ...

This applet shows how the graphs of sin (θ) and cos (θ) follow directly from the definition of these functions. Move the slider to change the angle. Observe that after the point moves once around the ...

Trigonometric graphs - Higher This circle has the centre at the origin and a radius of 1 unit. The point P can move around the circumference of the circle.