👉 Learn how to evaluate the tangent of an angle in degrees using the sum/difference formulas. To do this, we first express ...

👉 Learn the basics of graphing a tangent and a cotangent function. To plot the tangent and the cotangent graph, we choose a set of points and form a table of values with which we plot the points on ...

It is important to remember other angles rules, such as angles on a straight line add up to 180°, and to recognise angles in parallel lines. Make sure you are confident in applying Pythagoras’ theorem ...