Question Detail
Question
Evaluate the limit of \( \frac{\cos 2x - \cos x}{\sin^2 x} \) as \( x \) tends to 0.
Correct Answer
Option A is the correct answer.
Detailed Explanation
Using L'Hospital's rule or series expansion, the limit evaluates to ( -\frac{3}{2} ).
Hint
Exercise 1.1, Question 40.