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Which of the following… (Class 10 Maths Basic 2025, Q12)

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MathsCBSE Class 10 · Basic · Board exam 2025, set 430/1/1 · 1 mark · MCQ

CBSE Class 10 Mathematics Basic 2025: question 12

Set in the CBSE Class 10 board exam of 2025, paper 430/1/1, section A, question 12, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q12 · 1 mark · MCQSome Applications of Trigonometry

In the given figure, which of the following angles represents the angle of depression ?

  1. (A)x
  2. (B)y
  3. (C)z
  4. (D)a

Figure in the paper: A right-angled figure with observer at the top-left and object at the bottom-right. A dashed horizontal line from the observer. A line of sight joins observer to object. Angles marked: z between the horizontal line and the top of the vertical line at the observer, y between the vertical line and the line of sight at the observer, x at the object between the line of sight and the horizontal ground, and a at the bottom-left corner (right angle mark). See it in the official paper.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 430/1/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

The angle of depression is measured at the observer.

Hint 2

It is measured from the horizontal line, not from the vertical.

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. The angle of depression is the angle between the horizontal line through the observer's eye and the line of sight to an object below the observer.

  2. In the figure this is angle . The answer is option (C).

    1 mark

Answer: z, option (C)

Where the marks are

  • Identifies z as the angle between the horizontal and the line of sight at the observer (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Some Applications of Trigonometry, one at a time, marked against the answer key and marking points.Back to the full paper2025 board paper, set 430/1/1 (Basic): every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.