Question

Evaluate cos^-1(0)

Answer 1

Can you tell cos of which angle is 0 ??

Answer 2

\[\cos^{-1}(0)=\arccos(0)=\theta\]
\[\qquad\qquad 0=\cos(\theta)\]
What is theta ?

Answer 3

theta is 0

Answer 4

waiit nevermind

Answer 5

Cos(0) = 1.. and not 0..