 
 
 
10.2.15  Transforming sin(x) into cos(x)tan(x)
The sin2costan command
replaces sin(x) by cos(x)tan(x) in an expression.
- 
sin2costan takes
expr, an expression containing trigonometric functions.
- sin2costan(expr) returns
expr with anything of the form sin(x) replaced by
cos(x)tan(x).
Example
 
 
