Parallel shifting of the graph Student activity Play

Parallel shifting of the graph of the cosine function Whiteboard exercise Play

Reciprocals of basic trigonometric ratios Student activity Play

Rewriting trigonometric expressions as rsin(A + α) Student activity Play

Shifting the graph along the  x-axis Animation Play

Solving equations involving the cosine function Animation Play

Solving trigonometric equations using the tangent function Whiteboard exercise Play

Some consequences of the identities Student activity Play

Substituting – a complex problem Whiteboard exercise Play

Substituting – a complex problem Student activity Play

Sum and difference identities for the cosine Student activity Play

Sum and difference identities for the cosine Whiteboard exercise Play

Sum identity for the cosine Animation Play

The anti-derivative of the cosine function Whiteboard exercise Play

The cotangent and the cosecant Student activity Play

The derivative of the cosine function Animation Play

The derivative of the cosine function Student activity Play

The formula for rewriting acosA + bsinA as rsin(A + α) Animation Play

The graph of the derivative of the cosine function Animation Play

The integral of the cosine function Whiteboard exercise Play

The integral of the cosine function Student activity Play

The Pythagorean identity Whiteboard exercise Play

The Pythagorean identity revisited Student activity Play

The quotient of two functions Student activity Play

The values of the derivative of the cosine function Whiteboard exercise Play