Use your calculator to work out tan80∘+1tan80∘−1\displaystyle \sqrt{\frac{\tan 80^\circ + 1}{\tan 80^\circ - 1}}tan80∘−1tan80∘+1
Write down all the figures on your calculator display.
Write your answer to part (a) correct to 3 significant figures.
Practise OCR GCSE Maths Using a Calculator with exam-style questions for Foundation and Higher tier. 56 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.