PreCalc : Verify the Identity
posted by Phil HELP NEEDED ASAP .
Verify the Identity:
sin(x+π)/cos(x+3π/2) =tan^2xsec^2x
I've done:
sinxcosπ+cosxsinπ
/
cosxcos(3π/2)  sinxsin(3π/2)
sinx(1) + cosx(0)
/
cosx(0) sinx(1)
sinx/sinx
What do I do from here? Or what did I do wrong?

first, note that since sec^2 = 1+tan^2, the right side is just 1
On the left, you have arrived at sinx/sinx = 1
Done 
thank you!