f(0) = -2sin(4(0+45))-1 *the zeros is the symbol theta*

Question

Find the Amplitude,Period, Phase Shift and Vertical shift

Answer 1

f(Ø) = -2sin(4(Ø+45))-1

amplitude: 2
period = 360°/4 = 90° or π/2
Phase shift: 45° to the left
vertical shift: down 1