Double-angle formulas Class activity Play

Double-angle formulas Whiteboard presentation Play

Drawing a circle Student activity Play

Drawing a circle Whiteboard exercise Play

Equations involving the tangent function Student activity Play

Equations involving the tangent function Whiteboard exercise Play

Equations with sin(ax) Whiteboard exercise Play

Equations with  sin(ax) Student activity Play

Exact values of trigonometric ratios Animation Play

Exact values of trigonometric ratios for selected angles Student activity Play

Exact values of trigonometric ratios for selected angles Animation Play

Example of introducing a new variable Animation Play

Finding angles in a triangle Student activity Play

Finding angles in a triangle Whiteboard exercise Play

Finding double-angle formula for the sine Animation Play

Finding equal expressions Whiteboard exercise Play

Finding functions having the same graphs Whiteboard exercise Play

Finding sides Student activity Play

Finding the area of a triangle Whiteboard exercise Play

Finding the cosine and the tangent of an angle Animation Play

Finding the graph of the cosecant Animation Play

Finding the period Student activity Play

Finding the sine and the tangent of an angle Whiteboard exercise Play

Finding the sine of an angle lying in the first quadrant Whiteboard exercise Play

Finding the solution set of a trigonometric inequality Animation Play