Trigonometry

JKSSB Sub-Inspector (Telecommunication) · Basic Numeracy · 96 practice questions with answers and explanations: 27 Easy, 35 Medium, 34 Hard.

Sample questions

Sample Easy question 1

Find the value of cosec 45°.

  1. 1.21
  2. 1.31
  3. 1.41
  4. 1.51
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Answer: C. cosec 45° = 1/sin 45° = √2 ≈ 1.41.

Sample Medium question 2

Evaluate: cosec²60° - cot²60°

  1. 0
  2. 0.5
  3. 1
  4. 1.5
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Answer: C. By identity, this always equals 1.

Sample Hard question 3

If sin A + cos A = √2, find the value of sin A × cos A.

  1. 0.25
  2. 0.5
  3. 0.75
  4. 1
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Answer: B. Squaring: 1 + 2 sinA cosA = 2, so sinA cosA = 0.5.

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