Nine times the input minus seven is equal to the output. If the input is -1, what is the output?
1 answer:
You might be interested in
Consider the attached figure. If AB has length 1, then BC has length sin(15°) and CD (the altitude of triangle ABC) has length sin(15°)·cos(15°).
By the double angle formula for sin(α), ...
... sin(2α) = 2sin(α)cos(α)
Rearranging, this gives
... sin(α)·cos(α) = sin(2α)/2
We have
... CD = sin(15°)·cos(15°) = sin(2·15°)/2
... CD = sin(30°)/2 = (1/2)/2 = 1/4
That is, the altitude, CD, is 1/4 the hypotenuse, AB, of triangle ABC.
Answer:
<h3><em>2√41 unit</em>s</h3>Step-by-step explanation:
<h2>Explanation is in the attachment</h2><h3>Hope it is helpful to you ☺️</h3>