Question

please answer question number1-a​

Answer 1

Hey !

[ refer the attachment ]

Answer 2

$x \cos + y \sin = c .........(i)\\ x \cos - y \sin = d.........(ii) \\ equating \: both \: equation \: \\ we \: get \\ 2x \cos = c + d \\ \cos = \frac{c + d}{2x} \\ now \: put \: the \: value \: of \: cos \: in \: equation \: (i) \\ xcos + ysin = c \\ x \frac{c + d}{2x} + ysin = c \\ \frac{c + d}{2} + ysin = c \\ ysin = c - \frac{c + d}{2} \\ ysin = \frac{2c - (c + d)}{2} \\ ysin = \frac{c - d}{2} \\ sin = \frac{c - d}{2y}$

i hope that will help you