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3 years ago

B. what is a real-world example or use of surface area?

Mathematics

1 answer:

Anuta_ua [19.1K]3 years ago

5 0

Answer:

Surface area : It is the total area of a surface

The surface area is used in many places.

1) If we want to paint a wall, we have to find the total surface area of the wall.

2). If we want to place tiles in our floor we want to find surface area.

3)If we want to roof our houses we have to find the surface area.

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I don't need you to work it out, just theorem(s) i need to reach the answer :)

VikaD [51]

Not sure why such an old question is showing up on my feed...

Anyway, let $x=\tan^{-1}\dfrac43$ and $y=\sin^{-1}\dfrac35$ . Then we want to find the exact value of $\cos(x-y)$ .

Use the angle difference identity:

$\cos(x-y)=\cos x\cos y+\sin x\sin y$

and right away we find $\sin y=\dfrac35$ . By the Pythagorean theorem, we also find $\cos y=\dfrac45$ . (Actually, this could potentially be negative, but let's assume all angles are in the first quadrant for convenience.)

Meanwhile, if $\tan x=\dfrac43$ , then (by Pythagorean theorem) $\sec x=\dfrac53$ , so $\cos x=\dfrac35$ . And from this, $\sin x=\dfrac45$ .

So,

$\cos\left(\tan^{-1}\dfrac43-\sin^{-1}\dfrac35\right)=\dfrac35\cdot\dfrac45+\dfrac45\cdot\dfrac35=\dfrac{24}{25}$

7 0

3 years ago

Every morning, Lillian collects eggs from the hens on her family's farm. She puts the eggs in cartons of 16. On Monday, Lillian

Mars2501 [29]

Answer- D)11
37÷16=2 r5
16-5=11

5 0

2 years ago

Simplify this e5 x e4

Gre4nikov [31]

Answer:

hope it will help you

Step-by-step explanation:

follow me and like it.

7 0

2 years ago

Y=-155. Put in a table of 3 rows.

Alja [10]

Answer:

51.6666666667

Step-by-step explanation:

4 0

2 years ago

A company has a fleet of 200 vehicles. On average, 50 vehicles per year experience property damage. What is the probability that

ICE Princess25 [194]

Answer:

The probability is $\frac{1}{4}$ or 25%

Step-by-step explanation:

The question states the total number of vehicles, as well as the number of damaged vehicles on a yearly basis. If 50 vehicles in every 200 vehicles per year are damaged, then we can obtain:

Probability of a damaged vehicle in any given year = $\frac{Number of Damaged Vehicles}{Total Number of Vehicles}$

= $\frac{50}{200}$ = $\frac{1}{4}$ or 25%

4 0

2 years ago