trigtan takes as argument an expression
containing trigonometric functions.

trigtan simplifies this expression with the formula :

sin(x)^{2}+cos(x)^{2}=1, tan(x)=sin(x)/cos(x) and
tries to rewrite the expression only with tangents.

Input :

trigtan(sin(x)

`^`

4+cos(x)`^`

2+1)Output :

((tan(x))

`^`

2/(1+(tan(x))`^`

2))`^`

2+1/(1+(tan(x)`^`

2)+1Output, after simplification with normal :

(2*tan(x)

`^`

4+3*tan(x)`^`

2+2)/(tan(x)`^`

4+2*tan(x))`^`

2+1)