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Trigonometry
Mathematics · Kerala SSLC (Class 10) · English Medium · 38 questions and answers
Sample questions
- Q: What is the 'angle of elevation'?
- A: The angle measured upward from the horizontal to the line of sight of an object above you.
- Q: What is the 'angle of depression'?
- A: The angle measured downward from the horizontal to the line of sight of an object below you.
- Q: What is the memory aid for the basic ratios?
- A: 'SOH-CAH-TOA': Sine = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.
- Q: Common mistake: mixing up opposite and adjacent sides.
- A: The opposite side is across from the angle; the adjacent side touches the angle (and is not the hypotenuse). Label them from the angle you are using, not a fixed side.
- Q: What is the sine of an angle in a right triangle?
- A: \sin\theta = \dfrac{\text{opposite side}}{\text{hypotenuse}}.
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