Introducing a new variable Student activity Play

Inverse function of the cosine Student activity Play

Inverse trigonometric functions Whiteboard presentation Play

Inverse trigonometric functions Class activity Play

Looking for the formula for a trigonometric function Simulation Play

Looking for the formula for a trigonometric function Student activity Play

New variable in a trigonometric equation Animation Play

Other trigonometric ratios Student activity Play

Parallel shifting of the graph Student activity Play

Parallel shifting of the graph of the cosine function Whiteboard exercise Play

Period of the cosine Animation Play

Primitive period of the sine Student activity Play

Properties of trigonometric functions of a general angle (1) Whiteboard presentation Play

Properties of trigonometric functions of a general angle (1) Class activity Play

Properties of trigonometric functions of a general angle (2) Whiteboard presentation Play

Properties of trigonometric functions of a general angle (2) Class activity Play

Proving the cosine rule Animation Play

Range of trigonometric functions Student activity Play

Range of trigonometric functions Whiteboard exercise Play

Reading from the graph of the cosine function Student activity Play

Reading properties of the cosine from the graph Whiteboard exercise Play

Reciprocals of basic trigonometric ratios Student activity Play

Reduction formulas due to periodicity Whiteboard exercise Play

Reduction formulas due to periodicity Student activity Play

Reduction formulas for the cosine Animation Play