Answer:

Step-by-step explanation:
<u>Trigonometric Identities</u>

<u>Trigonometric ratios</u>

where:
is the angle- O is the side opposite the angle
- A is the side adjacent the angle
- H is the hypotenuse (the side opposite the right angle)
Using the trig ratio formulas for cosine and sine:
<u>Angles</u>


Therefore, using the trig identities and ratios:

Answer:
2x+18
Step-by-step explanation:
We can start by distributing the 2 to each term in the parentheses...
2(x)+2(9)
Multiply
2x+18
1. A. 10,000
Explanation: 10^4 = 10,000
2. x = -12
Explanation: see photo