If sin α−sin β=m and cos α cos β=n then cos(α−β)= – InterviewSolution

1.	If sin α−sin β=m and cos α cos β=n then cos(α−β)=
Answer» If $s i n α - s i n β = m$ and $c o s α c o s β = n$ then $c o s (α - β) =$

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