Question 315533
 sin Ѳ/(1-cosѲ) – (1+cosѲ)/sin Ѳ = 0
---
Multiply thru by sin(1-cos) to get:
sin^2 - (1+cos)(1-cos) = 0
---
sin^2 - (1-cos^2) = 0
---
sin^2 - sin^2 = 0
0 = 0
========================
Cheers,
Stan H.