Demonstration or proof? Student activity Play

Derivation of the formula Animation Play

Determining angles Whiteboard exercise Play

Determining angles Whiteboard exercise Play

Determining the sign of the tangent Whiteboard exercise Play

Determining the signs of trigonometric functions Student activity Play

Different angles Student activity Play

Diffraction of electrons Whiteboard exercise Play

Diffraction of electrons – the Davisson-Germer experiment Student activity Play

Diffraction of X-rays Whiteboard exercise Play

Diffraction of X-rays Student activity Play

Diffraction of X-rays Simulation Play

Diffuse reflection Simulation Play

Diffuse reflection Student activity Play

Does the triangle exist? Whiteboard exercise Play

Domain and periodicity of trigonometric functions Student activity Play

Domain and periodicity of trigonometric functions Whiteboard exercise Play

Double-angle formulas Class activity Play

Double-angle formulas Whiteboard presentation Play

Drawing a central angle Simulation Play

Drawing an angle Whiteboard exercise Play

Drawing an inscribed angle Simulation Play

Drawing angles Student activity Play

Drawing angles Student activity Play

Drawing reflection diagrams Student activity Play