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 ...

Let's remind ourselves of what the sine graph looks like so that we can see ... we can see that we should be expecting 2 solutions: 1 solution being between \(0^\circ\) and \(90^\circ\) and ...