state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Mathematics Complex Numbers Properties of Complex Numbers
The imaginary part of cosec(x + iy) is:
1
\(- \frac{\cos x \sin hy}{\cos 2y~ -~ \cos 2x}\)
2
\(\frac{\cos x \ \sin y}{ \cos hy ~- ~ \cos hx}\)
3
\(\frac{-\cos x \ \sin hy}{ \cos h2y ~- ~\cos 2x}\)
4
\(\frac{\cos x \ \sin y}{ \cos hy ~-~ \cos 2x}\)
5
Question Not Attempted