halftan takes as argument an expression
containing trigonometric functions.
halftan rewrites sin(x), cos(x) and tan(x)
in terms of tan(x/2).
Input:
Output:
^
2+1)/^
2)/((tan(2*x/2))^
2+1))Output, after simplification with normal(ans()):
Input:
^
2+cos(x)^
2)Output:
^
2+1))^
2+^
2)/((tan(x/2))^
2+1))^
2Output, after simplification with normal(ans()):