It looks like there's a small typo: instead of "sen," I assume you mean "sin," the standard notation for the sine function. The expression would then be:

\[
\cos(5x) + \sin(3x)
\]

If you need to simplify, differentiate, or integrate this expression, let me know! Otherwise, here's the expression as it is.

Would you like to proceed with a specific operation on this expression, or do you have any further questions?

### Related questions:
1. How do you differentiate \(\cos(5x) + \sin(3x)\)?
2. How do you integrate \(\cos(5x) + \sin(3x)\)?
3. What are the zeros of the function \(f(x) = \cos(5x) + \sin(3x)\)?
4. How do you find the Fourier series expansion of \(\cos(5x) + \sin(3x)\)?
5. What is the general solution to \(\cos(5x) + \sin(3x) = 0\)?

**Tip**: When dealing with trigonometric functions, knowing key identities like \(\sin^2(x) + \cos^2(x) = 1\) can simplify many problems!

Explore how to handle the trigonometric expression cos(5x) + sin(3x), including differentiation, integration, and zeros of the function. Learn important trigonometric identities such as sin^2(x) + cos^2(x) = 1, suited for Grades 10-12.

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