Evaluate the value of $c o t 90 °$

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Solution

We need to find the value of $c o t 90 °$
As per the trigonometric unit circle
$c o t 90 ° = 0$
Now let's find out using the terms $\cos$ and $\sin$
We know that
$c o t x = \frac{\cos x}{\sin x}$
$\Rightarrow c o t 90 ° = \frac{\cos 90 °}{\sin 90 °}$
As
$\cos 90 ° = 0, \sin 90 ° = 1$
$\Rightarrow c o t 90 ° = \frac{0}{1} = 0$
Hence, the value of $c o t 90 °$ is $0$

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