What is the domain of cot(3x) ?

The domain of cot(3x) is pi/3 n<x< pi/3+pi/3 n

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domain of cot(3x)

domain

cot (3 x)

\frac{π}{3} n < x < \frac{π}{3} + \frac{π}{3} n

Interval Notation

(\frac{π}{3} n, \frac{π}{3} + \frac{π}{3} n)

Solution steps

Take the denominator(s) of

cot (3 x)

and compare to zero:

x = \frac{π}{3} n

Periodicity of

cot (3 x) : \frac{π}{3}

Combine period:

\frac{π}{3} n \leq x < \frac{π}{3} + \frac{π}{3} n

and undefined points.

The domain is

\frac{π}{3} n < x < \frac{π}{3} + \frac{π}{3} n

f (x) = \frac{1}{- x + 2} + 3

w \cdot 4

f (x) = lo g_{5} (7 + x)

f (x) = ln (x + 3) + 1

f (x) = \frac{\frac{1}{7 - x}}{\frac{5}{x + 4}}