Trigonometric functions of the angle 45° Whiteboard exercise Play

Trigonometric functions of the general angle Student activity Play

Trigonometric functions of the sum and difference of angles (1) Whiteboard presentation Play

Trigonometric functions of the sum and difference of angles (1) Class activity Play

Trigonometric identity for tangent and cotangent Simulation Play

Trigonometric ratios in a right-angled triangle Class activity Play

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 Student activity Play

Two circles Simulation Play

Two circles Simulation Play

Two circles Student activity Play

Two circles Whiteboard exercise Play

Two circles and a line Student activity Play

Two circles and a line Whiteboard exercise 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