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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)).

Examples

Linearize cos(x) cos(y).

tlin(cos(x)*cos(y))
     
cos
xy
2
+
cos
x+y
2
          

Linearize cos(x)3.

tlin(cos(x)^3)
     
3
4
 cosx+
cos
x
4
          

Linearize 4cos(x)2−2.

tlin(4*cos(x)^2-2)
     
cos
x
          

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