Triple AngleMediumQuestion 200014
Question
sin 3θ in terms of sin θ is:
- A3 sin θ − 4 sin³θCorrect
- B4 sin³θ − 3 sin θ
- C3 cos θ − 4 cos³θ
- D2 sin θ cos θ
Correct answer
3 sin θ − 4 sin³θ
Explanation
sin 3θ = 3 sin θ − 4 sin³θ. Derived by expanding sin(2θ + θ).