Answer: A would be the best answer
Step-by-step explanation:
Answer:

Step-by-step explanation:
Let
, we proceed to transform the expression into an equivalent form of sines and cosines by means of the following trigonometrical identity:
(1)
(2)
Now we perform the operations: 



(3)
By the quadratic formula, we find the following solutions:
and 
Since sine is a bounded function between -1 and 1, the only solution that is mathematically reasonable is:

By means of inverse trigonometrical function, we get the value associate of the function in sexagesimal degrees:

Then, the values of the cosine associated with that angle is:

Now, we have that
, we proceed to transform the expression into an equivalent form with sines and cosines. The following trignometrical identities are used:
(4)
(5)




If we know that
and
, then the value of the function is:


Answer:
x= 1/3 =0.333
Step-by-step explanation:
<h2>Repeating Decimal to Fraction</h2>
Note: "..." is the repeating sign I'm using.
Answer: 2/9
<h3>
Steps</h3>
Let X equal the decimal number
Equation 1:
X = 0.2...
With 1 digit in the repeating decimal group,
create a second equation by multiplying
both sides by 10
X * 10 = 10X and 0.2...* 10 = 2.2...
Equation 2:
10X = 2.2...
Subtract equation 1 from equation 2
10X = 2.2... - X = 0.2...
We get
9X = 2
In conclusion, 0.2... = 2/9
<h2>Repeating Decimal to Mixed Number</h2>
This decimal cannot be a mixed number because it has no number in the one's, ten's, or hundred's place.
To find the midpoint of a line segment
Add both "x" coordinates, divide by 2.
Add both "y" coordinates, divide by 2.