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ZIMSEC O-Level Additional Mathematics

6.1.9.1Trigonometric ratios

Trigonometric ratios in ZIMSEC O-Level Additional Mathematics: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic20 practice questions1 lesson

Learning objectives

What the syllabus expects you to be able to do.

  1. 6.1.9.1.1Form 3: state the three basic trigonometric ratios and deduce the other three.

Lessons

  • The six trigonometric functions of any angle

    40 min

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Sample question

A sample question on this topic. Answer it, check it, then read the worked answer.

Trigonometric ratios: sample question

1 mark

Without a calculator, find the exact value of cos⁡120°\cos 120°. Give your answer as a fraction or a decimal.

Only if the answer has a unit, e.g. cm or km/h.

Turn Trigonometric ratios into a strength.

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