Hello: Whats up guys? I havent posted here in a little while, and after a long summer ive become a bit rusty on my physics so im gonna need a little help from you guys if possible. 1. The problem statement, all variables and given/known data Consider the sin wave of example 13.2 (see below for more info) with the wave function: y=(15.0cm)cos(0.157x-50.3t) At a certain instant, let point A be at the origin and point B be the first point along the x axis where the wave is 60.0 degrees out of phase with point A. What is the coordinate of point B? In example 13.2 the wave is characterized by: Amplitude=15.0cm Wavelength=40.0cm Frequency=8.00Hz 2. Relevant equations k=2pi/lamda T=1/F omega=2pi*f v=f*lamda 3. The attempt at a solution i really think im overthinking this problem, if the wave is pi/3 radians out of phase, wouldnt that be our phase constant? and from there, how would i turn a function of y(x,t) into y(x) by holding t constant? like how would the equation ive written be changed so i can find the proper coordinate?