Right Angled Trigonometry

Sample Right Angled Trigonometry questions

A few of the 65 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 12 marksGrade 4-5
   In a right-angled triangle, the side adjacent to angle C has length 14.1 cm, and the side hypotenuse to angle C has length 25.1 cm. Work out the size of angle C. Give your answer correct to 3 significant figures.
   Show the worked solution

   $\cos(C) = \dfrac{14.1}{25.1}$

What are the common mistakes in Right Angled Trigonometry?

When a pupil makes one of these on Revision Workshop, the marking engine names the mistake and explains it, instead of just marking the answer wrong.

• Chooses the wrong trigonometric ratio for the sides/angle given

  Used $cos$ instead of $sin$ - check which two sides (opposite/adjacent/hypotenuse) are involved before choosing the ratio

• Multiplies where division was needed, or vice versa

  Divided when the equation required multiplying (or vice versa) - rearrange the ratio equation carefully before solving for the unknown side

• Uses the reciprocal of the correct trigonometric ratio

  Flipped the fraction (used $\dfrac{17}{29.3}$

Quick answers about Right Angled Trigonometry

How many Right Angled Trigonometry practice questions are there?

There are 65 self-marking GCSE and IGCSE Maths questions on Right Angled Trigonometry, written for AQA, Pearson, OCR, Pearson International GCSE Maths A (4MA1), Cambridge IGCSE Mathematics (0580), Cambridge IGCSE (9-1) Mathematics (0980) across Foundation and Higher and Core and Extended tier. Each one is marked instantly and has a full worked solution.

Do I need an account to practise Right Angled Trigonometry?

No. You can start practising Right Angled Trigonometry straight away without an account. A free account keeps your results across sessions, so you can see your progress on this topic over time.