Use your calculator to work out tan120∘+1tan120∘−1\displaystyle \sqrt{\frac{\tan 120^\circ + 1}{\tan 120^\circ - 1}}tan120∘−1tan120∘+1
Write down all the figures on your calculator display.
Write your answer to part (a) correct to 3 significant figures.
192 exam-style questions on OCR GCSE Maths Using a Calculator. Each one has a worked solution and a mark scheme showing where the marks go.