Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it.

Question

lim x→0 (sin^−1 x)/7x

Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it.
lim x→0 x/(tan^−1(4x))

Find the limit. Use l'Hospital's Rule if appropriate. If there is a more elementary method, consider using it.
lim x→0 (e^x−e^−x−2x)/(x−sin x)