All Questions
1
question
8
votes
2
answers
192
views
Imaginary $\cos^{-1}$ value significance?
When I was bored in AP Psych last year, I jokingly asked myself if there was a cosine inverse of $2$. Curious about it, I tried calculating it as follows:
$$
\begin{align*}
\cos (x) &= 2 \\
\sin (...
- 1,871