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. At point P the \(x\)-coordinate is \(\cos{\theta}\) and the \(y ...

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.

This circle has the centre at the origin and a radius of 1 unit. The point P can ... At point P the \(x\)-coordinate is \(\cos{\theta}\) and the \(y\)-coordinate is \(\sin{\theta}\) ...