
cos2atan(Expr)
Example:
acos2atan(2*acos(x)) gives
cosx→sinx/tanx
Returns an expression with cos(x) rewritten as sin(x)/tan(x).
cos2sintan(Expr)
Example:
cos2sintan(cos(x)) gives sin(x)/tan(x)
Rewrite – Tangent
atanx→asinx
Returns an expression with atan(x) rewritten as :
atan2asin(Expr)
Example:
atan2asin(atan(2*x)) returns
atanx→acosx
Returns an expression with atan(x) rewritten as :
atan2acos(Expr)
tanx→sinx/cosx
Returns an expression with tan(x) rewritten as sin(x)/cos(x).
tan2sincos(Expr)
Example:
tan2sincos(tan(x)) gives sin(x)/cos(x)
halftan
Returns an expression with sin(x), cos(x) or tan(x) rewritten as tan(x/2).
halftan(Expr)
Example:
halftan(sin(x)) returns 2*tan(1/2*x)/(tan(1/2*x)
2
+1)
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