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Find the exact value of cos 120°.

This question was previously asked in
SSC CGL 2023 Tier-I Official Paper (Held On: 18 Jul 2023 Shift 4)
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  1. -0.5
  2. 0
  3. 0.5
  4. 1

Answer (Detailed Solution Below)

Option 1 : -0.5
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Detailed Solution

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Concept used:

Cosθ = sin (90° - θ)

In second quadrant value of cos is negative

Calculation:

Cos120° = cos (90° +30°)

⇒ - sin30° = -0.5

∴ The correct option is 1

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Last updated on May 30, 2025

-> The SSC Exam Dates 2025 has been released on the official website.

-> The SSC CGL Notification 2025 will be released on 9th June 2025 at ssc.gov.in.

 

-> The SSC CGL application 2025 submission will be open from 9th June to 4th July 2025. 

 

-> The SSC CGL Tier 1 Exam 2025 Dates have been revised. The SSC CGL Exam will be conducted from 13 August to 30 August, 2025.

 

-> Candidates can refer to the SSC CGL syllabus for a better understanding of the exam structure and pattern.

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