Reading from the graph of the cosine function Student activity Play

Reading properties of the cosine 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

Reduction formulas for trigonometric functions Whiteboard exercise Play

Reduction formulas for trigonometric functions Student activity Play

Rewriting the trigonometric expressions Animation Play

Rewriting trigonometric expressions as rcos(A – α) Student activity Play

Rewriting trigonometric expressions as rcos(A – α) Whiteboard exercise Play

Rewriting trigonometric expressions as rsin(A + α) Student activity Play

Rewriting trigonometric expressions as rsin(A + α) Whiteboard exercise Play

Sign of values of trigonometric functions Whiteboard exercise Play

Signs of the ratios in the different quadrants Whiteboard exercise Play

Simple trigonometric equations Whiteboard exercise Play

Simple trigonometric equations Class activity Play

Simple trigonometric equations Student activity Play

Simple trigonometric equations Whiteboard presentation Play

Simple trigonometric inequalities Whiteboard exercise Play

Simple trigonometric inequalities Student activity Play

Solutions of trigonometric equations Whiteboard exercise Play

Solutions of trigonometric equations Student activity Play