Find the Exact Solution to the Equation Without a Calculator $$\cos ^ { - 1 } ( \cos x ) = \frac { 1 } { 4 }$$

question 3

Multiple Choice

Find the exact solution to the equation without a calculator.
- $$\cos ^ { - 1 } ( \cos x ) = \frac { 1 } { 4 }$$

• A) \(\frac { 1 } { 4 }\)
• B) \(\frac { 1 } { 8 }\)
• C) 4
• D) 0

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Definitions:

Alternative Hypothesis

The hypothesis that suggests there is a statistically significant effect or relationship present, opposite to the null hypothesis.

Test Statistic

A figure derived from data in a sample for a hypothesis testing, utilized to decide if the null hypothesis should be discarded.

Battery Life

The duration for which a battery can provide power before it needs recharging, often measured under specific conditions or usage patterns.

Normal Distribution

A bell-shaped frequency distribution curve, where most occurrences take place in the middle of the distribution and taper off symmetrically towards either end.