I need some help with this question

1. are the triangles similar and if so why? what is the value of x? show your work.

Find the solutions for a triangle with a =16, c =12, and b = 63º

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0