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How do you find the value of $tan90$ ?

1 Answer

Oct 20, 2015

$tan(90^@)$ is undefined

Explanation:

By definition, using a reference triangle with hypotenuse of unit length,
$color(white)("XXX")tan(theta) = ("length of opposite side")/("length of adjacent side")$

As $theta rarr 90^@$
$color(white)("XXX")"length of opposite side" rarr 1$
and
$color(white)("XXX")"length of adjacent side" rarr 0$

$1/0$ is undefined $rArr tan(90^@)$ is undefined.

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