UPSC NDA I 2019 Mathematics Solved Paper
Show Para
Consider the following for the next 02 (two) items:
It is given that cos(θ−α )=a, cos(θ−β )=b.
It is given that cos(θ−α )=a, cos(θ−β )=b.
[NDA I 2019]
© examsiri.com
Question : 51 of 120
Marks:
+1,
-0
What is cos(α - β) equal to ?
[NDA I 2019]
Go to Question: