# Chapter 6 - Analytic Trigonometry - Section 6.1 The Inverse Sine, Cosine, and Tangent Functions - 6.1 Assess Your Understanding - Page 474: 49

$\text{Not defined}$

#### Work Step by Step

Value of certain composite functions formula: $f(f^{-1}(x)) = \cos{(\cos^{-1}{x})}= x \hspace{25pt} -1 \leq x \leq 1$ Note that $1.2 \text{ isn't in the interval } \left[-1,1 \right]$. $\therefore \cos{(\cos^{-1}{(1.2)})} \text{ isn't defined}$.

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