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Reported Question / Answer
Q.) Cos(α - β) =
1)
cosαcosβ+sinαsinβ
2)
cosαcosβ+sinαsinβ
3)
sinαcosβ-cosαsinβ
4)
sinαcosβ+cosαsinβ
5)
NULL
Answer :
2
Thank you for reporting wrong Question / Answer / Options
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Message / Correct Answer / Suggestion
Human Verification : Answer 2 + 3 = ?
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