NOTE: In Questions 46–50 the limits are all indeterminate forms of the type We have therefore
applied L’Hôpital’s Rule in each one. The indeterminacy can also be resolved by introducing
which approaches 1 as a approaches 0. The latter technique is presented in square brackets.
- (B)
[Using sin 2x = 2 sin x cos x yields cos x = 2 · 1 · 1 = 2.]