Question

What is the radian value of arccos(-3/sqrt(2))?

Answer 1

Answer:

Not defined over the real numbers

Step-by-step explanation:

Let

$x = arc \cos( \frac{ - 3}{ \sqrt{2} })$

This implies that:

$\cos(x) = \frac{ - 3}{ \sqrt{2} }$

This implies that:

$\cos(x) = - 2.12$

The range of the cosine function is -1≤y≤1

Therefore

$arc \cos( \frac{ - 3}{ \sqrt{2} })$

is not defined for over the real numbers.