Correct Answer - Option 2 :
\(\frac 12\)
Concept:
sin (2nπ + θ) = sin θ
sin (2nπ - θ) = -sin θ
sin (90 + θ) = cos θ
Calculation:
To Find: Value of sin (2190°)
⇒ sin (2190°) = sin(360° × 6 + 30°)
= sin (12π + 30°)
= sin (30°) (∵ sin (2nπ + θ) = sin θ)
=
\(\frac 12\)
