# What is the inverse cosine of 0.55?

$\text{cos"^(-1)(0.55)"=56.632987"^"o}$
The inverse cosine for a number is represented as ${\text{cos}}^{- 1} x$. It allows you to determine the angle. So the inverse cosine of $0.55$ is ${\text{cos}}^{- 1} \left(0.55\right)$. Use your scientific calculator, to get $\text{cos"^(-1)(0.55)"=56.632987"^"o}$.