Proving Trigonometric identity: sin(x)/cos(x)=tan(x)

Proving Trigonometric identity: sin(x)/cos(x) = tan(x) using Geogebra
What will happen when you move the black graph of tangent function?
– Apolinario "Sam" Ortega

Information: Proving Trigonometric identity: sin(x)/cos(x)=tan(x)