Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Trigonometry Inverse Trigonometric Functions
If tan-1 x + tan-1 \(y = \frac{\pi }{4}\), then
1
x + y + xy = 1
2
x + y - xy = 1
3
x + y + xy + 1 = 0
4
More than one of the above
5
None of the above