Option A. 2 + 2 - 2. Answer & Solution Answer: Option A Solution: - = 2 + 2. - 2

What is - = ? — Trigonometry MCQ

Aptitude · Q313

Trigonometry

Competitive Exams · Aptitude · question 313

Q313

What is

sin α - sin β = ?

2 cos \frac{α + β}{2} sin \frac{α - β}{2}

Answer

2 sin \frac{α + β}{2} sin \frac{α - β}{2}

2 cos \frac{α - β}{2} sin \frac{α + β}{2}

2 cos \frac{α + β}{2} cos \frac{α - β}{2}

Answer: Option A

Answer: Option A

Solution:

sin α - sin β = 2 cos \frac{α + β}{2} . sin \frac{α - β}{2}