Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Complex Numbers Properties of Complex Numbers
What is the modulus of the complex number \(\rm \frac {\cos \theta - i \sin \theta}{\cos \theta + i \sin \theta}\) where \(\rm i = \sqrt {-1}\) ?
1
1
2
0
3
2
4
More than one of the above
5
None of the above