`sqrt(1+cosx)(dy)/(dx)=sqrt(1-cosy)`  A)`sec((y)/(2))
Channel: Doubtnut
Date: 24/05/2020

`sqrt(1+cosx)(dy)/(dx)=sqrt(1-cosy)`  A)`sec((y)/(2))+tan((y)/(2))=c[cos((x)/(2))-cot((x)/(2))]` B)`cosec((y)/(2))-cot((y)/(2))=c[sec((x)/(2))+tan((x)/(2))]` C)`2sqrt(1-cosy)=2sqrt(1+cosx)+c` D)`sqrt(1+sinx)=c sqrt(1-siny)`