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please help me solve this question 4. Cornelia is trying to solve the equation for : arceos (cos I) She reasons (incorrectly): Cosine and arecosine

please help me solve this question
4. Cornelia is trying to solve the equation for : arceos (cos I) She reasons (incorrectly): "Cosine and arecosine fare inverse functions, so arceos (cos r) - a for all values of a. There- fore, the Answer is of - Explain what's wrong with Cornelia's reasoning, and find the correct answer to Cornelia's

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