Question

The graph of which trigonometric functions include the point (0,2)? (Select 3)

Answer 1

Remember cos 0  = 1, sin 0 = 0, tan = 0, sin(pi/2)=1

(0,2) on the graph means when x=0 then y=2.  We check the choices.

First box.  y(0) =cos 0 + 1 = 1 + 1 = 2  CHECK ME

Second box. y(0)=2 cos 0 = 2  CHECK ME

Third box.  y(0) = sin 0 + 1 = 0 + 1 = 1  don't check me

Fourth box.  y(0) = tan 0 + 1 = 0 + 1 = 1  don't check me

Fifth box.  y(0) = sin(pi/2)+1 = 1+1 = 2  CHECK ME