UPSC NDA I 2017 Mathematics Solved Paper

© examsiri.com
Question : 17 of 120
 
Marks: +1, -0
Let x, y, z be positive real numbers such that x, y, z are in GP andtan1x,tan1y and tan1z are in AP. Then which one of the following is correct?
[NDA I 2017]
Go to Question: