Proving trigonometric identities Whiteboard exercise Play

Proving trigonometric identity using the Pythagorean identity Whiteboard exercise Play

Quadratic inequalities Whiteboard presentation Play

Quadratic inequalities Whiteboard exercise Play

Quadratic inequalities Whiteboard exercise Play

Quadratic inequalities Student activity Play

Quadratic inequalities Class activity Play

Quadratic inequalities and geometry Student activity Play

Quadratic inequalities and geometry – a tunnel Whiteboard exercise Play

Quadratic inequalities with one and with two unknowns Student activity Play

Quadratic inequalities with one and with two unknowns Animation Play

Quadratic inequalities with two unknowns Whiteboard exercise Play

Quadratic inequalities with two unknowns Simulation Play

Quadratic inequalities – using a parameter 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

Reading the solutions of the inequality from the graph Whiteboard exercise Play

Recalling trigonometric facts Student activity Play

Recalling trigonometric facts Whiteboard exercise Play

Reciprocals of basic trigonometric ratios Student activity Play

Reduction formulas Animation Play

Reduction formulas due to periodicity Student activity Play

Reduction formulas due to periodicity Whiteboard exercise Play