1. The problem statement, all variables and given/known data Two waves of the same frequency have amplitudes of 1.26 and 2.33. They interfere at a point where their phase difference is 62.0(deg). The resultant amplitude is: A. 3.13 B. 3.59 C. 0.77 D. 1.21 E. 2.15 2. Relevant equations y(x,t) = y_m sin(kx-wt) 3. The attempt at a solution Well I know right away the answer is not B because there is a phase difference. So what I did was (1.26+2.33)*sin(62) and I get 3.17 which is not in the list. I am supposed to just assume its 3.13 (A) or am I doing something wrong. Thanks help is appreciated.