What is the domain of f(x)=(cos(x))/(1-sin(x)) ?

The domain of f(x)=(cos(x))/(1-sin(x)) is 2pin<= x< pi/2+2pin\lor pi/2+2pin<x<2pi+2pin

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domain of f(x)=(cos(x))/(1-sin(x))

domain

f (x) = \frac{cos ( x )}{1 - sin ( x )}

2 πn \leq x < \frac{π}{2} + 2 πn or \frac{π}{2} + 2 πn < x < 2 π + 2 πn

Solution steps

Take the denominator(s) of

\frac{cos ( x )}{1 - sin ( x )}

and compare to zero:

x = \frac{π}{2} + 2 πn

Periodicity of

\frac{cos ( x )}{1 - sin ( x )} : 2 π

Combine period:

2 πn \leq x < 2 π + 2 πn

and undefined points.

The domain is

2 πn \leq x < \frac{π}{2} + 2 πn or \frac{π}{2} + 2 πn < x < 2 π + 2 πn

2 x^{2} - 3 x + 4

f (x) = \frac{( x - 5 )}{5}

\frac{x ^{2} - 1}{x + 5}

240

f (x) = \frac{x ^{2} + 7}{x ^{2} + 9}

What is the domain of f(x)=(cos(x))/(1-sin(x)) ?
The domain of f(x)=(cos(x))/(1-sin(x)) is 2pin<= x< pi/2+2pin\lor pi/2+2pin<x<2pi+2pin