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If sin θ = 3/5 and θ is acute, then cos θ =
A3/5
B4/5
C5/3
D5/4
Answer & 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_
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