Algebra Help Please

Question

Add: -3∠-125° + 7∠115°

(A) - 1.24 R + 8.80 U

(B) 3.89 R - 4.68 U

(C) - 4.68 R + 8.80 U

(D) 0.15 R + 1.73 U

(E) none of these

Answer 1

Convert each term of the given expression to rectangular form using x=rcosθ and y = rsinθ. Then add the respective x and y coordinates together to get the resultant.

Visit the following Desmos graph to see how this can be accomplished there.

desmos.com/calculator/g0hplrpx7t