Question

Pls solve
Pls pls pls solve

Answer 1

We know that, y=2sinA/(1+cosA+sinA) =2sinA/(1+sinA+cosA)× (1+sinA-cosA)/(1+sinA-cosA)

=2sinA(1+sinA-cosA)/(1+sinA)^2-(cosA)^2.

=2sinA(1-cosA+sinA)/1+sin^2(A)+2sinA-cos^2(A)

=2sinA(1-cosA+sinA)/1-cos^2(A)+sin^2(A)+2sin(A)

=2sinA(1-cosA+sinA)/2sin^2(A)+2sinA

=2sinA(1-cosA+sinA)/2sinA(1+sinA)

y=1-cosA+sinA/1+sinA