Correct Answer - Option 3 : (√3 – 1)/2√2
Formula Used:
sin(A – B) = sinA × cosB – sinB × cosA
Calculation:
Now, from the above used formula
⇒ sin15° = sin(45° – 30°)
⇒ sin45° × cos30° – sin30° × cos45°
⇒ (1/√2) × (√3/2) – (1/√2) × (1/2)
⇒ (√3 – 1)/(2 × √2)
∴ (√3 – 1 )/ 2√2