Answer:
Options B and D
Step-by-step explanation:
Phrase shift of a trignometric function is the horizontal shift of the function towards right or left.
Vertical shift is shift up or down.
The graph of y = sin x is translated three units down.
-- This is vertical shift and not phase shift.
The graph of y = csc x is translated three units to the right
-- This is a phase shift as y = csc (x+3)
The graph of y = cos x is translated three units up. -- No, vertical shift.
The graph of y = sec x is translated three units to the left.
-- Yes, phase shift
The graph of y = cot x is reflected over the horizontal axis.
-- No, reflection
The graph of y = tan x is reflected over the vertical axis.-- No, reflection
Only options B D are phase shifts.
