Answer: The correct option is (c). 
Step-by-step explanation: We are given to select the correct basic identity that we will use to verify the following:

We have

In order to verify the given trigonometric equation, we must have

Thus, the required identity that we will use is

Option (c) is CORRECT.
If Each side of an equilateral triangle<span> is 10 m. ... Thus </span>triangle<span> APC is a right</span>triangle<span>. The length of CA is 10 m, and the length of PC is 5 m, and hence you can use Pythagoras' theorem to find the length of AP, which </span>is the height<span> of the </span>triangle<span>ABC.
</span>If Each side of an equilateral triangle<span> is 10 m. ... Thus </span>triangle<span> APC is a right</span>triangle<span>. The length of CA is 10 m, and the length of PC is 5 m, and hence you can use Pythagoras' theorem to find the length of AP, which </span>is the height<span> of the </span>triangleABC.
Answer:
The angle of elevation is 36.87 degrees
Step-by-step explanation:
see the attached figure to better understand the problem
In the right triangle ABC of the figure
----> by CAH (adjacent side divided by the hypotenuse)
substitute the given values


Answer:
Gain: (Decrease)
Loss:
(Increase)
Step-by-step explanation:
<h3>Answer:
49y^2 - 56</h3>
===============================
Work Shown:
7y^2 + 7(6y^2 - 8)
7y^2 + 7(6y^2) + 7(-8)
7y^2 + 42y^2 - 56
49y^2 - 56