The tangent ratio compares the length of what to the length of what

By definition in a triangle with a right angle, the tangent compares two of its sides:
 Tanx = (C.O) / (C.A)
 Where,
 x: angle
 C.O: Opposite leg.
 C.A: Adjacent leg.
 Therefore the tangent compares the length of the opposite leg with the length of the adjacent leg.
 
 the tangent compares the length of the opposite leg with the length of the adjacent leg
 Tanx = (C.O) / (C.A)

Were the multiply choice?