Are these two answers correct? , ! julia wants to simplify the term in a trigonometric identity that she is proving. which of the following identities should she use to her? select all that apply.

Let's help Julia to solve this problem. Given the term:



We need to simplify it. So, we will take a look at the identities above, thus, from the second identity:



∴

And from the five equation:



∴

Substituting these identities in the term:



In fact, your answer is correct.

Idon’t understand sorry

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.