Correct Answer - Option 2 : ± 2√5
Given:
2 Sin θ + 5 Cos θ = 3
Formula used:
If a Sin θ + b Cos θ = c
then, b Sin θ – a Cos θ = ± √(a2 + b2 – c2)
Calculation:
5 Sin θ – 2 Cos θ = ± √(22 + 52 – 32)
⇒ ± √(4 + 25 – 9)
⇒ ± 2√5
∴ The value of 5 sin θ - 2 cos θ is ± 2√5.