Evaluate the value of cot90°
We need to find the value of cot90°
As per the trigonometric unit circle
cot90°=0
Now let's find out using the terms cos and sin
We know that cotx=cosxsinx⇒cot90°=cos90°sin90°
As
cos90°=0,sin90°=1
⇒cot90°=01=0
Hence, the value of cot90°is 0