6.23.15 Transforming sin(x) into cos(x)*tan(x): sin2costan
The sin2costan command replaces sin(x) by cos(x)tan(x)
in an expression.
-
sin2costan takes one argument:
expr, an expression containing trigonometric functions.
- sin2costan(expr) returns
expr with anything of the form sin(x) replaced by
cos(x)tan(x).
Example.
Input:
sin2costan(sin(2*x))
Output: