(a)[1]
State the value of $\cos 90^{\circ}$.
(b)[5]
Find the expression for $x$ in terms of $n$.
Mathematics 0580 · IGCSE · Trigonometric functions
Trigonometric functions — practice question
The diagram contains two separate right-angled triangles that share one side. It includes angles of 30^{\circ}, with side length $n$ and hypotenuse $x$. Diagram not to scale.