UPSC NDA I 2021 Mathematics Solved Paper

© examsiri.com

Question : 16 of 120

Marks: +1, -0

tan−1x+cot−1x=‌

π

2

‌‌ holds, when

[NDA-I 2021]

x∈R
x∈R−(−1,1) only
x∈R−{0} only
x∈R−[−1,1] only

Go to Question:

Prev Question

Next Question