Therefore since the trig equation we are solving is sin ... 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: 1 ...

The graphs of sine and cosine are included ... equations that are always true. Each trigonometric function also has an inverse that can be used to find an angle from a ratio of sides.

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 ...

This is the trig. That curve above is a special function. It's called the tangent ... Two things to notice before getting to the graph. First, what I call "y" could also be called the "opposite ...

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.