Anyone knows how to do "Using Congruence Postulates," I need help with an equation, can someone show me step by step.

It would be D. You already have an angle and a side congruency, so you would just need another angle. To prove congruency, they have to all be in a line, so if you are going from corner to corner of the shape, they would all be in line, and you wouldn’t skip any. I’ll attach a picture to hopefully give you a visual as to what I am talking about.. I hope this helps :)

Sin(a)+cos(a)+cot(a)-1=2(csc(x)+1)