what is the domain of the functoin y=tan x ?

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hala718 | High School Teacher | (Level 1) Educator Emeritus

Posted on

y= tan(x)

Since tan(x)= sinx/cos(x)

Then the domain is all real numbers except when cos(x)= 0

==> cos(x)= 0 when x = pi/2 + npi

==> Then the domain is R - { pi/2+npi}

The range is all real numbers.