- 4 ( 7a + 7 ) - 2a = 92
- 28a - 28 - 2a = 92
- 28a - 2a - 28 = 92
Collect like terms
- 30a - 28 = 92
Add both sides 28
- 30a - 28 + 28 = 92 + 28
- 30a = 120
Divide both sides by - 30
- 30a ÷ - 30 = 120 ÷ - 30
<h2>
<em>a</em><em> </em><em>=</em><em> </em><em>-</em><em> </em><em>4</em><em> </em></h2>
9.375 because 74 divided by 4 equals 18.75 and divide by 2 to simplify you get 9.375
We will start off working on the right hand side.
<span>cot x - tan x </span>
<span>= [cos x / sin x] - [sin x / cos x] </span>
<span>= [(cos x)^ 2 - (sin x)^2] / [sin x cos x] </span>
<span>This is where it gets a bit tougher if you do not have your formula list with you. </span>
<span>(cos x)^ 2 - (sin x)^2 = cos(2x) </span>
<span>sin 2x = 2 sin x cos x </span>
<span>Note that by arranging the second formula, we will have sin x cos x = (1/2) sin 2x </span>
<span>Hence, we will get: </span>
<span>[(cos x)^ 2 - (sin x)^2] / [sin x cos x] </span>
<span>= [cos 2x] / (1/2)[sin 2x] </span>
<span>= 2[cos 2x] / [sin 2x] </span>
<span>= 2cot 2x </span>
Answer: C?
Step-by-step explanation:
Because reflecting means like think of a mirror it’s reflecting you so the opposite side would be the bottom right quadrant please tell me if I’m right?
