Use your calculator to work out tan67.5∘+1tan67.5∘−1\displaystyle \sqrt{\frac{\tan 67.5^\circ + 1}{\tan 67.5^\circ - 1}}tan67.5∘−1tan67.5∘+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.