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

Proving the cosine rule Animation Play

Quartet and other multiplets: 'n + 1' rule Animation Play

Range of trigonometric functions Whiteboard exercise Play

Range of trigonometric functions Student activity Play

Reading from graphs Student activity Play

Reading properties of the sine from the graph Student activity Play

Reading properties of the sine 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 sine Animation Play

Reduction formulas for the tangent Animation Play

Reflection symmetry in the coordinate system in the line y = –x Student activity Play

Regular pentagon Animation Play

Relations between the sine and the cosine Whiteboard exercise Play

Relative velocity vectors Student activity Play

Repulsion between current-carrying conductors Animation Play

Rewriting the sine using double-angle formulas for the tangent Animation Play

Right hand rule Animation Play

Rounding decimals to a whole number Student activity Play

Rounding decimals to a whole number Animation Play

Rule for the nth term of a sequence Student activity Play

Rule for the  nth term of a sequence Whiteboard exercise Play

Ruler-and-compass constructions Whiteboard presentation Play