Students often find it hard to mix trigonometric and exponential functions. Here are some reasons why:

1. Complex Functions: The way trigonometric identities and exponential rules work together can feel really confusing.

2. Integration Skills: Many students aren’t very good at techniques like integration by parts or substitution, which are important for solving these problems.

3. Finding Patterns: It can be tough to recognize the right methods for functions like $e^{\sin x}$ or $\sin(e^x)$.

To help with these challenges, students should practice regularly. They can also get help from tutors or join study groups.