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Assoli18 [71]
2 years ago
11

How to use inverse cosin

Mathematics
1 answer:
Alecsey [184]2 years ago
4 0

Answer:

sec

Step-by-step explanation:

1/cosin = sec or cosin^-1

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The figure shown is an equilateral triangle. Calculate the length of each side and give your answer in cm.
cricket20 [7]
Given at you have an equilateral triangle, all sides have the same length.

Therefore,
First side 2x-7 = Second side x+y-9 = Third side y+5

Let us look at the second and third sides for now:
x+y-9 = y+5
x = y+5 - (y-9)
x = y-y+5+9
x = 14

Then we look at equating the first and third sides:
2x-7 = y+5
y = 2x-7-5

Substitute x =14 in the equation above:
y = 2(14)-7-5
= 28-7-5
= 21-5
= 16

The length of the third side is:
y+5 = 16 +5 = 21

Given that the length of each sides are the same in an equilateral triangle, all sides have the length 21cm.
4 0
3 years ago
a rectangular computer screen has an area o A square inches. The width of the computer is 7 inches. Which equation rpresents x t
neonofarm [45]

Answer:

x = A/7

Step-by-step explanation:

Given that the screen is rectangular, recall that the area A of a rectangle whose length is L and width is W is given as

A = L * W

Hence if the width is 7 inches and the length is x inches then the area which is A square inches is connected to both sides as

A = x * 7

Divide both sides by 7

x = A/7 inches

6 0
2 years ago
Round each mixed number to the nearest whole number and then estimate the product
AnnZ [28]
3 4/5 rounds to 4
5 1/6 rounds to 5
4 x 5 = 20

I hope this helped! :)
3 0
3 years ago
A field is a rectangle with a perimeter of 1260 feet. The length is 100 feet more than width. Find the width and length of the r
lyudmila [28]

To solve this problem you must apply the proccedure shown below:

1. The formula for calculate the perimeter of a rectangle is:

P=2L+2W

Where L is the length and W is the width.

2. The length is 100ft more than the width, therefore:

L=W+100

3. Substitute values into the formula for calculate the perimeter and solve for the width:

1260=2(W+100)+2W\\ W=265ft

3. Then, the length is:

L=265ft+100ft\\ L=365ft

The answer is: The length is 365ft and the width is 265ft

5 0
3 years ago
Helllllppppp!!! ASAP
charle [14.2K]
All real numbers D.)

4 0
3 years ago
Read 2 more answers
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