The simplified expression is the one in option B.
<h3>
How to simplify the expression?</h3>
Remember that:

With these two, we can rewrite the numerator as:

Replacing that in the given expression, we have:

Now, if we multiply and divide by cos(-x), we get:

Now remember that:

With these two properties:

Then the correct option is B.
If you want to learn more about trigonometric identities:
brainly.com/question/7331447
#SPJ1
By using the PEMDAS order of operations, we get 3(6+7) = 39.
The equation be 3(6+7) then the correct answer is 34.
<h3>What is PEMDAS order of operations?</h3>
The order of operations exists as a law that describes the proper sequence of stages for estimating a math expression. We can recognize the order utilizing PEMDAS: Parentheses, Exponents, Multiplication, Division (from left to right), Addition, and Subtraction (from left to right).
Given: 3(6+7)
By using the PEMDAS order of operations, we get
(6+7) = 13
Then we get
3(6+7) = 3
13
= 39.
Therefore, the value of 3(6+7) = 39.
To learn more about PEMDAS order of operations refer to:
brainly.com/question/550188
#SPJ9
Answer:
C. 84.
Step-by-step explanation:
27 students in his grade took the test. 14 did not find it easy. 14/27 is 0.52. 0.52 times the 162 total students is 84.