Awave has the form y = a cos(2πx/λ0 + π/6) when x < 0. for x > 0, the wavelength is λ0/6. by applying continuity conditions at x = 0, find the amplitude ax > 0 (in terms of a) and phase ϕ of the wave in the region x > 0. (use any variable or symbol stated above as necessary.)