Use a calculator to find the value of the expression rounded to two decimal places.
-$\cos ^ { - 1 } \left( - \frac { \sqrt { 3 } } { 3 } \right)$
A) -0.62
B) 125.26
C) 2.19
D) -35.26

Question

Quizplus · Accepted Answer

The value of $\cos^{-1}(-\frac{\sqrt{3}}{3})$ is approximately 2.19 radians. The inverse cosine function returns an angle in the range [0, π] for real inputs, and -$\frac{\sqrt{3}}{3}$ corresponds to an angle in the second quadrant.

Use a Calculator to Find the Value of the Expression cos⁡−1(−33)\cos ^ { - 1 } \left( - \frac { \sqrt { 3 } } { 3 } \right)cos−1(−33​​)

Use a Calculator to Find the Value of the Expression $\cos ^ { - 1 } \left( - \frac { \sqrt { 3 } } { 3 } \right)$