Question: If C<sup>2</sup> + S<sup>2</sup> = 1, then $\frac{1 + C + iS}{1 + C - iS}$ is equal to :...

Question

If C² + S² = 1, then $\frac{1 + C + iS}{1 + C - iS}$ is equal to :

Answer 1

Sol. Let Z = C + iS Ž 1/Z = C – iS

Al, $\frac{1 + C + iS}{1 + C - iS} = \frac{1 + Z}{1 + 1/Z}$ = Z = C + iS

Question: If C<sup>2</sup> + S<sup>2</sup> = 1, then \(\frac{1 + C + iS}{1 + C - iS}\) is equal to :...