If in doubt, \(k\cos (x - \alpha )\) usually works. These worked examples show the processes you'll need to go through to rewrite an expression in this form. Write \(2\sin x^\circ + 5\cos x^\circ ...

Solving logarithmic and exponential equations Revise the laws of logarithms in order to solve logarithmic and exponential equations Trigonometric expressions The addition formulae and ...

Trigonometry is a branch of mathematics that lays out how the sides, lengths and angles in a triangle are related, and as ...