Let’s look at how to use trigonometric identities to calculate ... then the sin button on the calculator, followed by 53 (Note that on new calculators we don’t need to press the × button).

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}{ ...