Given:
cos 120°
To find:
The exact value of cos 120° in simplest form with a rational denominator.
Solution:
We have,
It can be written as
![[\because \cos (90^\circ-\theta)=-\sin \theta]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Ccos%20%2890%5E%5Ccirc-%5Ctheta%29%3D-%5Csin%20%5Ctheta%5D)
![[\because \sin 30^\circ=\dfrac{1}{2}]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Csin%2030%5E%5Ccirc%3D%5Cdfrac%7B1%7D%7B2%7D%5D)
Therefore, the exact value of cos 120° is 
.
In lines 4-5, the author refers to a "fashion maven’s" tone primarily in order to: imply that Genevieve has only a superficial appreciation of mechanical pencils (Option A).
<h3>What is comprehension passage?</h3>
Comprehension passages are sure-shot scoring questions. Even if the information in the passage deviates from actual events, it must be used to answer the questions.
Now,
- According to the passage given, in the context, only Option A makes sense according to Genevieve's acclamations.
Hence, Option A is the most appropriate choice, i.e., In lines 4-5, the author refers to a "fashion maven’s" tone primarily in order to: imply that Genevieve has only a superficial appreciation of mechanical pencils (Option A).
To learn more about comprehension passages, refer to the link: brainly.com/question/24716030
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Answer:figure out how much she got for babysitting and then add 150
Step-by-step explanation:
