........................................................... cm (Total for question = 4 marks) Trigonometry SOH CAH TOA – Things to remember: 1. Label your sides first, you’ll need O, H and A... 2. Choose if you need SOH, CAH or TOA... 3. the one you need with your thumb, 4. Write the equation, 5. Solve it, then you’re done! Questions: 1. The diagram shows triangle ABC. BC = 8.5 cm. Angle = 90°. ABC Angle ACB = 38°. Work out the length of AB. Give your answer correct to 3 significant figures. ........................................................... cm (Total 3 marks) 2. PQR is a triangle. PQR = 90°. = 12.5 cm. PQ QR = 5 cm. Calculate the value of x. Give your answer correct to 1 decimal place.
........................................................... cm (Total for question = 4 marks) Trigonometry – SOH CAH TOA Things to remember: 1. Label your sides first, you’ll need O, H and A... 2. Choose if you need SOH, CAH or TOA... 3. the one you need with your thumb, 4. Write the equation, 5. Solve it, then you’re done! Questions: 1. The diagram shows triangle ABC. BC = 8.5 cm. Angle ABC = 90°. Angle ACB = 38°. Work out the length of AB. Give your answer correct to 3 significant figures. ........................................................... cm (Total 3 marks) 2. PQR is a triangle. PQR = 90°. PQ = 12.5 cm. QR = 5 cm. Calculate the value of x. Give your answer correct to 1 decimal place.
revision-guide-aiming-for-5.docx