An example of a proof Student activity Play

Applying the sum and difference identities for the sine Whiteboard exercise Play

Applying the sum and difference identities for the sine and cosine Student activity Play

Applying the sum and difference identities for the sine and cosine Whiteboard exercise Play

Applying the sum and difference identities for the tangent Student activity Play

Applying the sum and difference identities for the tangent Whiteboard exercise Play

Applying trigonometric identities to equations Student activity Play

Applying trigonometric identities to equations Whiteboard exercise Play

Basic trigonometric identities Whiteboard exercise Play

Basic trigonometric identities Student activity Play

Different ways of proving Animation Play

Different ways of proving – example as a proof Whiteboard exercise Play

Double-angle formulas Whiteboard presentation Play

Double-angle formulas Class activity Play

Example as a proof Student activity Play

Identities for trigonometric functions Whiteboard presentation Play

Identities for trigonometric functions Class activity Play

Identities in trigonometric equations Animation Play

Proving a trigonometric identity Animation Play

Proving identities Whiteboard exercise Play

Proving identities Student activity Play

Proving identity for the tangent Whiteboard exercise Play

Proving the cosine rule Animation Play

Proving trigonometric identities Whiteboard exercise Play

Proving trigonometric identities Animation Play