The value of [tex]cos^{-1}(\frac{2}{3})[/tex] is 0.84 radian or 48.18°
Given,
[tex]cos^{-1}(\frac{2}{3})[/tex]
It is an inverse trigonometric function.
Inverse trigonometric functions are also known as "Arc Functions" because they produce the length of arc required to obtain a given value of trigonometric functions. Inverse trigonometric functions are the inverse of trigonometric functions such as sine, cosine, tangent, cosecant, secant, and cotangent. We know that trigonometric functions are particularly useful for right angle triangles. When two sides of a right triangle are known, these six important functions are used to find the angle measure.
Thus, using calculator,the value of [tex]cos^{-1}(\frac{2}{3})[/tex] is 0.84 radian or 48.18°
To learn more about inverse trigonometric functions refer here
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