Counting problems Whiteboard presentation Play

Counting problems Class activity Play

Creating the sequence from the blocks Animation Play

Deductions for algebraic transformations Student activity Play

Deductions for algebraic transformations Whiteboard exercise Play

Definition of basic trigonometric ratios Animation Play

Definition of trigonometric functions Whiteboard exercise Play

Definition of trigonometric functions Student activity Play

Depth of the harbour entrance Student activity Play

Derivatives of trigonometric functions Whiteboard presentation Play

Derivatives of trigonometric functions Class activity Play

Difference identity for the cosine Animation Play

Differentiation rules (2) Class activity Play

Differentiation rules (2) Whiteboard presentation Play

Divisibility by 8 Student activity Play

Divisibility by 8 Whiteboard exercise Play

Domain and periodicity of trigonometric functions Student activity Play

Double-angle formula for the cosine Student activity Play

Double-angle formula for the cosine Whiteboard exercise Play

Double-angle formulas Whiteboard presentation Play

Double-angle formulas Class activity Play

Drawing a circle Student activity Play

Drawing a circle Whiteboard exercise Play

Equations involving the cosine function Whiteboard exercise Play

Equations involving the cosine function Student activity Play