Solving logarithmic and exponential equations ... equations Trigonometric expressions The addition formulae and trigonometric identities are used to simplify or evaluate trigonometric expressions.

Solve trigonometric equations in Higher Maths using the double angle formulae, wave function, addition formulae and trig identities.

Maybe you can use the double angle formula and you don't have a problem with trig identities ... then I measured the sides with a ruler—no math involved (yet). What would happen if I drew ...

When applied to an angle measure, the three trigonometric functions produce the various combinations of ratios of side lengths. In other words: The tangent of angle A = the length of the opposite ...