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Vinvika [58]
3 years ago
15

Solve the triangle, please help

Mathematics
1 answer:
Cloud [144]3 years ago
6 0

Answer:

Side A = 14; Side B = 24.25; Side C = 28 |

Angle A = 60 degrees; Angle B = 30 degrees; Angle C = 90 degrees

Step-by-step explanation:

Okay, I find this question a bit weird because you already have two sides

So, I'm going to assume:

Side A = 14

Side B = 24.25

<h3>Finding side C</h3>

Using Pythagoras theorem

a^2 + b^2 = c^2

14^2 + 24.25^2 = c^2

196 + 588.0625 = c^2

c=\sqrt{784.0625}

c = 28 units (28.00111605)

<h3>Finding Angles (A,B and C)</h3>

In the diagram, we can see there is a right angle triangle, and a little square

Therefore, we can say that Angle C is 90 degrees

Finding Angle A/B:

There are so many ways to find it, I'll just use this though

<h3>Method: Using SOHCAHTOA to find B, then finding A</h3>

Using SOHCAHTOA

I'll be using the sine rule to find Angle B

sin =\frac{opposite}{hypotenuse}

sin^-1 (\frac{14}{28} )

Angle B = 30 degrees

The interior angles in a triangle add up to 180 degrees

Angle A = 180 - (90 + 30)

Angle A = 60 degrees

Verify:

60 + 30 + 90 = 180

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3 years ago
A string passing over a smooth pulley carries a stone at one end. While its other end is attached to a vibrating tuning fork and
nasty-shy [4]

Answer:

correct option is C)  2.8

Step-by-step explanation:

given data

string vibrates form =  8 loops

in water loop formed =  10 loops

solution

we consider  mass of stone = m

string length = l

frequency of tuning = f

volume = v

density of stone = \rho

case (1)  

when 8 loop form with 2 adjacent node is \frac{\lambda }{2}

so here

l = \frac{8 \lambda _1}{2}      ..............1

l = 4 \lambda_1\\\\\lambda_1 = \frac{l}{4}

and we know velocity is express as

velocity = frequency × wavelength   .....................2

\sqrt{\frac{Tension}{mass\ per\ unit \length }}   =   f × \lambda_1

here tension = mg

so

\sqrt{\frac{mg}{\mu}}   =   f × \lambda_1     ..........................3

and

case (2)  

when 8 loop form with 2 adjacent node is \frac{\lambda }{2}

l = \frac{10 \lambda _1}{2}      ..............4

l = 5 \lambda_1\\\\\lambda_1 = \frac{l}{5}

when block is immersed

equilibrium  eq will be

Tenion + force of buoyancy = mg

T + v × \rho × g = mg

and

T = v × \rho - v × \rho × g    

from equation 2

f × \lambda_2 = f  × \frac{1}{5}  

\sqrt{\frac{v\rho _{stone} g - v\rho _{water} g}{\mu}} = f \times \frac{1}{5}     .......................5

now we divide eq 5 by the eq 3

\sqrt{\frac{vg (\rho _{stone} - \rho _{water})}{\mu vg \times \rho _{stone}}} = \frac{fl}{5} \times \frac{4}{fl}

solve irt we get

1 - \frac{\rho _{stone}}{\rho _{water}}  = \frac{16}{25}

so

relative density \frac{\rho _{stone}}{\rho _{water}} = \frac{25}{9}

relative density = 2.78 ≈ 2.8

so correct option is C)  2.8

3 0
3 years ago
Henry buys an item for $4.23. He gives the cashier a $20 bill. How much money should Henry get back?
N76 [4]

Answer:

Henry will get $15.77 back.

Step-by-step explanation:

20 - 4.23 = 15.77

7 0
3 years ago
Emergency help please thank you
AlladinOne [14]

I would say the third asnwer, so 90 degrees :)

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3 years ago
What's one tenth of 300
brilliants [131]
30 is your mystery answer :)
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3 years ago
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