O-Level Math Exam: A checklist for understanding trigonometry concepts

O-Level Math Exam: A checklist for understanding trigonometry concepts

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Frequently Asked Questions

You need to master trigonometric ratios (sine, cosine, tangent), angles of elevation and depression, bearings, and the sine and cosine rules for solving triangles.
Use the mnemonic SOH CAH TOA: Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent. Practice applying these ratios in different triangle problems.
Angle of elevation is the angle from the horizontal upwards to an object, while angle of depression is the angle from the horizontal downwards to an object. Theyre used in problems involving heights and distances.
Bearings are used to specify directions. True bearings are measured clockwise from North (000°), while compass bearings use North, South, East, and West as reference points.
Use the sine rule when you have a side and its opposite angle, and another side or angle. Use the cosine rule when you have two sides and the included angle, or when you need to find an angle given all three sides.
Common mistakes include incorrect application of SOH CAH TOA, using the wrong rule (sine vs. cosine), forgetting to set your calculator to the correct mode (degrees or radians), and not drawing clear diagrams.
Practice regularly with a variety of problems, focus on understanding the underlying concepts, and use past papers to familiarize yourself with the exam format and common question types.
Yes, learn how to use the sine, cosine, and tangent functions, as well as the inverse trigonometric functions (sin-1, cos-1, tan-1) for finding angles. Also, know how to convert between degrees and radians if necessary.
Drawing clear and accurate diagrams is crucial. A good diagram helps you visualize the problem, identify the relevant angles and sides, and apply the correct trigonometric ratios or rules.