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2 years ago

Which Trig. Function do you use to find X?

Mathematics

2 answers:

zvonat [6]2 years ago

7 0

Answer:

Cosine

Step-by-step explanation:

Cosine = $\frac{adjacent}{hypothenuse}$

Cos 70 = $\frac{x}{8}$

0.633 = $\frac{x}{8}$

0.633 x 8 = $\frac{x}{8}$ x 8

5.064 = x

MAXImum [283]2 years ago

4 0

Answer:

Cosine.

Step-by-step explanation:

Hypotenuse : Opposite the right angle

Opposite : opposite the angle

Adjacent : The only side left

Soh (sin) Cah (Cos) Toa (Tan)

Hypotenuse and adjacent are the only ones that have a side on them

so h and a. Cah Cosine Adjacent and hypotenuse. Cosine

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An airliner maintaining a constant elevation of 2 miles passes over an airport at noon traveling 500 mi/hr due west. At 1:00 PM,

butalik [34]

Answer:

$\frac{ds}{dt}\approx 743.303\,\frac{mi}{h}$

Step-by-step explanation:

Let suppose that airliners travel at constant speed. The equations for travelled distance of each airplane with respect to origin are respectively:

First airplane

$r_{A} = 500\,\frac{mi}{h}\cdot t\\r_{B} = 550\,\frac{mi}{h}\cdot t$

Where t is the time measured in hours.

Since north and west are perpendicular to each other, the staight distance between airliners can modelled by means of the Pythagorean Theorem:

$s=\sqrt{r_{A}^{2}+r_{B}^{2}}$

Rate of change of such distance can be found by the deriving the expression in terms of time:

$\frac{ds}{dt}=\frac{r_{A}\cdot \frac{dr_{A}}{dt}+r_{B}\cdot \frac{dr_{B}}{dt}}{\sqrt{r_{A}^{2}+r_{B}^{2}} }$

Where $\frac{dr_{A}}{dt} = 500\,\frac{mi}{h}$ and $\frac{dr_{B}}{dt} = 550\,\frac{mi}{h}$ , respectively. Distances of each airliner at 2:30 PM are:

$r_{A}= (500\,\frac{mi}{h})\cdot (1.5\,h)\\r_{A} = 750\,mi$

$r_{B}=(550\,\frac{mi}{h} )\cdot (1.5\,h)\\r_{B} = 825\,mi$

The rate of change is:

$\frac{ds}{dt}=\frac{(750\,mi)\cdot (500\,\frac{mi}{h} )+(825\,mi)\cdot(550\,\frac{mi}{h})}{\sqrt{(750\,mi)^{2}+(825\,mi)^{2}} }$

$\frac{ds}{dt}\approx 743.303\,\frac{mi}{h}$

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3 years ago

You have 7 consecutive numbers, with the smallest number n.

Romashka [77]

Answer:

a) 7 numbers in term of n = n+1, n+2, n+3, n+4, n+5, n+6 and n+7

b) n+1+n+2+n+3+n+4+n+5+n+6+ n+7

= 7n+28

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

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3 years ago

How many hours and minutes elapsed from 8:00 a.m to 2:30 p.m?

seraphim [82]

Answer:

6 hours and 30 mins

Step-by-step explanation:

This is right answer because from 8:00 to 9:00 is 1 hour and each hour is 60 mins and each minute is 60 secs. I hope this helps and please give me the crown

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2 years ago

What is the output value of 2x^2-9x-5 input value is x=2

Kobotan [32]

Answer:

-15

Step-by-step explanation:

Go to (Mâthway) This page can help you with problems like that. (replace the â with a when searching the site.)

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2 years ago

Exponential form of 16807

mylen [45]

<span>It is: 7 to the power of 5 = 16807</span>

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3 years ago

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