2 sin 2 β + 4 cos (α + β) sin α sin β + cos 2 (α + β) =
Mathematics · JEE Advanced · NTA Exams — Trigonometry
2 sin2 β + 4 cos (α + β) sin α sin β + cos 2 (α + β) =
- sin 2α
- cos 2 β
- cos 2α
- sin 2β
Answer
(C) cos 2 α
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