Inverse trigonometric functions can make solving equations tricky because they have special ranges and can act in unexpected ways.

Difficulties:

1. Figuring out the right angle is tough.
2. Some problems can have more than one answer, which makes it confusing.
3. The main values can limit the options we have.

Solution Approach:

1. Be careful when using inverse functions like $\sin^{-1}(x)$, $\cos^{-1}(x)$, or $\tan^{-1}(x)$.
2. Remember to consider the repeating nature of these functions to find all possible solutions.