Question

How many solutions does Arccos(0) have?

A. 1
B. 2
C. 0
D. Infinite

I'm confused because of the capital letter on Arccos.

Answer 1

capital letter makes no difference, still the inverse cosine function
cos = 0 when angle is pi/2, 3pi/2 ... and so on
there are infinite number of solutions
however, the function f(x) = arccos(x) will only have 1 solution: f(0) = pi/2

Answer 2

I thought the capital letter meant that it's a function instead of a relation?

Answer 3

capital letter is for mane part of arccos function

Answer 4

oh sorry i as unaware there was a distinction

Answer 5

was*

Answer 6

It's okay, I think I found what I was looking for in my book, thanks your effort :)