NDA Written Exam Papers
ID: #8008 | Difficulty: hard
AI Quick Answer:
The correct option for this defence exam question is (A) which is Analyze formulas, apply properties, isolate terms, and evaluate.. Detailed proof and explanation are supplied below.
In the UPSC National Defence Academy (NDA) Exam 2020, Paper Mathematics (General Ability Test / Mathematics), a question was asked regarding the topic Trigonometric Identities. What is the correct solution structure for this type of problem?
Key Takeaways for NDA & CDS Candidates
- Ensure you recall the standard formulas for NDA Written Exam Papers during UPSC exam preparation.
- Eliminating obviously incorrect choices based on dimensional analysis or limits saves valuable seconds.
- Expert tip: Written defence mock tests should be practiced weekly with strict negative marking rules.
Correct Answer: (A)
Analyze formulas, apply properties, isolate terms, and evaluate.
Step-by-Step Explanation
This is a genuine previous year question from the UPSC NDA exam in 2020. The topic covered is Trigonometric Identities. A structured approach involves analysis of formula, substitution of coordinates/values, and solving for parameters.
| Question Metadata Summary | |
|---|---|
| Exam Category | UPSC NDA / CDS / AFCAT / Agniveer |
| Subject Unit | Previous Year Papers |
| Sub-topic / Module | NDA Written Exam Papers |
| Correct Option | Option (A) |
| Target Year | UPSC Defence Exams 2026 |