Respuesta :

Answer:

cot(- 90)° = 0

Step-by-step explanation:

Using the identity

cot x = [tex]\frac{cosx}{sinx}[/tex] , then

cot(- 90)° = [tex]\frac{cos(-90)}{sin(-90)}[/tex] = [tex]\frac{0}{-1}[/tex] = 0