Staff Selection Commission Quantitative Aptitude — Question 262

Question

If sin θ = 3/5, find cos θ

1. 3/5
2. 4/5
3. 5/3
4. 5/4

Correct answer

B — 4/5

Explanation (English)

Using sin²θ + cos²θ = 1: cos²θ = 1 - 9/25 = 16/25, so cos θ = 4/5

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