Not going to do (1), (2), (3) since they are implicit from (a) and (b) and require graphs (which aren't supported on brainly).
We have 
, that means, if plug in 
we get 
.
Doman of cosine is ![x\in[0,1]](https://tex.z-dn.net/?f=x%5Cin%5B0%2C1%5D)
.
Hope this helps.
Hm, D would equal either 5 or 6.
Answer:
1. 37.0 in²
2. 55 m²
Step-by-step explanation:
1) all angles in an equilateral triangle are 60°
The dotted line is an angle bisector which also divides the triangle into two congruent right angle triangles
Find the base using trig ratio
cos(30) = 8/base
base = 16sqrt(3)/3
Area = ½ × 16sqrt(3)/3 × 8
= 36.95041723 in²
2. d1: 5 + 5 = 10
d2: 3 + 8 = 11
Area = ½ × 10 × 11
= 55 m²
Answer:
C. 37.8 units
Step-by-step explanation:
ED = 17/ cos(38°) = 17 / 0.7880 = 21.6 units
DF = 17× tan (38°) = 17× 0.7813 = 13.3 units
CD = 10/13.3 × 21.6 = 16.2 units
so, the length of CE = 21.6+16.2 = 37.8 units
Division is the splitting of large numbers (in this case) numbers into equal groups of smaller numbers.
Here are some terms you need to understand before you divide:
The number being divided is called the <em><u>dividend</u></em>.
The number that you're dividing by is called the <u><em>divisor</em></u>.
The answer that you get to the division problem is called the <em><u>quotient</u></em>.
For example:
Let's try dividing 4 ÷ 2 .
Since 4 is the number being divided, it is the <em>dividend</em>.
And since were are dividing 4 (the dividend) by 2, 2 is the <em>divisor</em>.
We need to try and find the quotient to solve 4 ÷ 2 .
Think of it this way;
There are 6 cookies and we need to divide them equally so that 2 people can have the same amount of cookies.
6 ÷ 2 = 3
You know the answer is 3 because 2 goes into 6 three times. 2 × 3= 6 (Since you asked a question about division, I'm guessing you know multiplication.)
3 for one person and 3 for the other.
So how many does each person get? 3 cookies, fair and square.
A nice way to check this problems is fact families, as I have mentioned before with the multiplication problem.
Hope this helps!
-- Alina (:
