# Introduction In this lab, you will learn how to compute the inverse cosine (arccos) function in C. The lab covers two main steps: reading a valid input value between -1 and 1, and then using the `acos()` function from the C math library to calculate the arccos of the input. The step-by-step instructions provide a comprehensive guide on input validation and performing the arccos calculation, ensuring you have a solid understanding of this trigonometric operation in C programming.
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