alleryStart learning →If sin θ = 3/5 and θ is acute, then cos θ =
- 3/5
- 4/5
- 5/3
- 5/4
Show answer and solution
Correct answer: B. 4/5
1. sin²θ + cos²θ = 1.
2. cos²θ = 1 − 9/25 = 16/25.
3. θ acute → cos θ positive → cos θ = 4/5.
_Source: KMAT Karnataka 2022 PYQ Q.68_
NMAT Trigonometric Functions — practice questions
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