Denominator[expr]The denominator of a fraction:
Denominator[2 / 3]
The denominator of a fraction with symbols:
Denominator[a / b]
Denominator[a + b]
The denominator can be used to extract the negative exponents of an expression:
Denominator[a x^n y^-m]
The denominator of a rational expression:
Denominator[Sin[x]^a (Sin[x] - 2)^-b]
The denominator of a Gaussian rational expression:
Denominator[3/7 + I/11]
Denominator threads over lists:
Denominator[{1, 2, 3, 4, 5, 6}/3]
Denominators of common trigonometric functions:
Denominator[{Sin[x], Cos[x], Tan[x], Csc[x], Sec[x], Cot[x]}, Trig -> True]
Denominators of common hyperbolic functions:
Denominator[{Sinh[x], Cosh[x], Tanh[x], Csch[x] , Sech[x], Coth[x]}, Trig -> True]
See also Numerator.