Double AngleMediumQuestion 200010
Question
sin 2θ in terms of sin θ and cos θ is:
- Asin²θ + cos²θ
- B2 sin θ cos θCorrect
- Ccos²θ − sin²θ
- D2 cos²θ − 1
Correct answer
2 sin θ cos θ
Explanation
sin 2θ = sin(θ + θ) = sin θ cos θ + cos θ sin θ = 2 sin θ cos θ.