How to find the equation of a tangent from a point to a circle? Animation Play

Huygens' principle Whiteboard exercise Play

Huygens' Principle Student activity Play

Identities for trigonometric functions Class activity Play

Identities for trigonometric functions Whiteboard presentation Play

Inverse function of the tangent Student activity Play

Inverse trigonometric functions Whiteboard presentation Play

Inverse trigonometric functions Class activity Play

Justification of the tangent function identity Animation Play

Line that is tangent to both circles Animation Play

Locus Student activity Play

Looking for the formula for a trigonometric function Student activity Play

Looking for the formula for a trigonometric function Simulation Play

Miscellaneous problems Student activity Play

More about the rate of change Student activity Play

More constructions Student activity Play

More on tangents Student activity Play

Mutual position of a circle and a line Student activity Play

Mutual position of a circle and a line Whiteboard exercise Play

Mutual position of a line and a circle Whiteboard presentation Play

Mutual position of a line and a circle Class activity Play

Mutual position of two circles Student activity Play

Parabola and a tangent line Simulation Play

Parallel and perpendicular lines Animation Play

Period of the tangent function Animation Play