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First, we need to realise that we will be using the trigonometric identity sin(x)² + cos(x)² = 1
As our goal is to end up with an equation involving only sin, we will therefore ...

First advice I have for you - don't panic! As soon as you enter the room panicking, you will lose control of timing, won't pay as much attention to the wording of the passages, and will ultimately not ...