Welcome to A-level Maths Explained! This video project is supported by the Worshipful Company of Actuaries, a Livery Company of the City of London established in 1979 restricted to actuaries. Through ...

Note: This only works when \(x\) is measured in radians. We are now going to look at more complex trigonometric functions where we will use the general rule: \(\int {\cos (ax + b)dx = \frac{1}{a}} ...