Manual

334 Functions and commands
asinx → atanx Returns an expression with asin(x) rewritten as:
asin2atan(Expr)
Example:
asin2atan(2*asin(x)) returns
sinx → cosx*tanx Returns an expression with sin(x) rewritten as cos(x)*tan(x).
sin2costan(Expr)
Example:
sin2costan(sin(x)) gives tan(x)*cos(x)
Cosine
acosx → asinx Returns an expression with acos(x) rewritten as /2–asin(x).
acos2asin(Expr)
Example:
acos2asin(acos(x)+asin(x)) returns /2
acosx → atanx Returns an expression with acos(x) rewritten as:
acos2atan(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)
x
1 x
2
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

atan
2
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1 x
2
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
atan

2
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1 x
2
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atan–
2

2
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x
1 x
2
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


atan–



