We need to find the value of cot 90
Solution
As per the trigonometric unit circle, cot (90) = 0
Now will find out using the terms cos and sin
We know that cot x can be expressed in terms of cos and sin as
cot x= cos x / sin x
Hence cot 90= sin 90 /cos 90
As per the values of cos and sin
cos90=0, sin90=1
cot 90= cos 90 / sin 90
cot 90= 0 /1
Therefore cot (90) = 0
Answer
The value of cot 90 = 0
