Using technology, graph the following cofunction identities and identify which functions on the graph are equal.Use a different colour for each function. Attach the graph.Using your knowledge from previous courses, explain what kind of transformations are occurring to the trigonometric functions to make them equivalent expressions.

a) sin (x)

b) cos (x)

c) -sin (x)

d) cos (pi/2 + x)

e) sin (pi/2 + x)