Home › If sin θ = 3/5 and θ is acute, then cos θ =
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_
Related questions
Identity: sin²θ + cos²θ = ?If tan θ = 1, what is θ (acute)?cos 60° = ?sin 30° = ?If tan α = √3 + 2, then the value of tan α − cot α is:Given 10 sin⁴α + 15 cos⁴α = 6, find the value of 27 cosec⁶α + 8 sec⁶α.If tan α = √5 - 2, then the value of tan α - cot α is:The general solution of $\cos x = 1/2$ is: