Question

cosec^2( A+B)=cosec^2(C+D)

Answer 1

Answer:

as A=C and B=D, A+B =C+D

and hence,

cosec^2(A+B) = cosec^2(C+D)

and hence, the answer is proved ...

Answer 2

$\cosec^{2} (A+B) = \cosec^{2} (C+D)$

It implies that,

$A+B=C+D$