Question

verify the following:
(cos^2(x))/(sin^2(x)+5sin(x)+4)=(1-sin(x))/(4+sin(x))

Answer 1

factor the denominator on the left hand side
and use the identity cos^2x = 1 - sin^2 x for the numerator

Answer 2

i did that but i don't know where to go from there

Answer 3

this is what i have so far