If simple harmonic motion is described by x = (2/2)sin(2t + ), the phase angle is ______ when the initial conditions x(0) = -1/2

If simple harmonic motion is described by x = (√2/2)sin(2t + ϕ), the phase angle ϕ is ______ when the initial conditions x(0) = -1/2 and x'(0) = 1.

Answer problem without referring back to the text. Fill in the blank or answer true/false.