Finding the derivative of this trig function

[leticia beira]

Homework Statement

homework

Relevant Equations

--

Para f (θ) = √3.cos² (θ) + sen (2θ), uma inclinação da reta tangente, uma função em θ = π / 6, é?

 

[berkeman]

Homework Statement:: homework
Relevant Equations:: --

For f (θ) = √3.cos² (θ) + sen (2θ), a slope of the tangent line, a function at θ = π / 6, is it?

Your attachments are not working for some reason. It looks like it might be a file security issue. What format are the files that you are trying to attach?

 

[Mark44]

Your attachments are not working for some reason. It looks like it might be a file security issue. What format are the files that you are trying to attach?

I don't think there is an attachment, other than possibly the translation from Portuguese to English.
I see post #1 in Portuguese, but the quoted text in post #2 is in English.

A better translation is, I believe, the following:

If $f(\theta) = \sqrt 3 \cos^2(\theta) + \sin(\theta)$, find the slope of the tangent to the curve when $\theta = \frac \pi 6$.​

@leticia beira, have you tried taking the derivative, $f'(\theta)$ and evaluating it at $\theta = \frac \pi 6$? That seems to be what the question is asking for.