but many fail to make the leap on how crucial circles are for trig functions. With static graphs and equations, it's possible to get a handle on the rules of what various functions do and mean.

Therefore since the trig equation we are solving is sin and it ... we need to use the rule in the 2nd quadrant. From the graph of the function, we can see that we should be expecting 2 solutions ...

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 ...

The graphs of sine and cosine are included ... variety of intricate equations known as identities, equations that are always true. Each trigonometric function also has an inverse that can be ...