Trigonometric ratios in a right-angled triangle Whiteboard presentation Play

Trigonometric ratios – problems Student activity Play

Trigonometric ratios – tangent Whiteboard exercise Play

Trigonometry of a general angle Class activity Play

Trigonometry of a general angle Whiteboard presentation Play

Two circles externally tangent Whiteboard exercise Play

Two circles internally tangent Whiteboard exercise Play

Two internally tangent circles Whiteboard exercise Play

Two parallel tangents to a circle Whiteboard exercise Play

Undefined gradient Animation Play

Unknown angle in a triangle Animation Play

Using tangent theorems Student activity Play

Using tangent theorems Whiteboard exercise Play

Using the calculator Student activity Play

Using the calculator Whiteboard exercise Play

Using the difference identity for the tangent Whiteboard exercise Play

Using the double-angle formulas for the tangent to rewrite cosine Whiteboard exercise Play

Using the double-angle formulas for the tangent to rewrite sine and cosine Student activity Play

Using the tangent Student activity Play

Using the tangent Animation Play

Using the tangent to find the zero of a function Whiteboard exercise Play

Values of the tangent Animation Play

Vessels of the circulatory system Illustration Play

What is the radius? Student activity Play

What is the radius? Whiteboard exercise Play