10 is the answer. Hope that helped
I believe the answer is -2,000.288 feet but im not 100% sure. hope this helps, have an amazing day :)
Since the coefficient of
in the line
is 0, it's a vertical line. The line that we want to find is parallel to
, so that line is vertical, too, i.e., it has the form
.
Then, as the line cointains the point
, which has the x-coordinate equal to -3, our line is
.
Given:
To find:
The exact value of cos 15°.
Solution:
Using half-angle identity:
Using the trigonometric identity:
Let us first solve the fraction in the numerator.
Using fraction rule:
Apply radical rule:
Using :