10.2.2 Linearizing a trigonometric expression

The tlin command linearizes products and integer powers of the trigonometric functions (e.g. in terms of sin(n x) and cos(n x)).

• tlin takes expr, an expression containing trigonometric functions.
• tlin(expr) returns the expression with the trigonometric functions linearized.

Examples

Linearize cos(x) cos(y).

Linearize cos(x)³.

Linearize 4cos(x)²−2.