Ask question

Ask question

All categories

3 years ago

10

2020 people formed a line. In one move, you are allowed to exchange the positions of two people, separated by one other person.

Can you always sort the people form tallest to shortest using these moves?

1 answer:

Vladimir79 [104]3 years ago

7 0

Answer:

yes you CAN you can use the descending to ascending formular but on people in which they might be a mixup of tallest and shortest

You might be interested in

A mermaid is swimming at sea level when a human comes by. She dives underwater at a rate of 8 meters per second. She continues t

Kay [80]

She will be at 160 meters

4 0

2 years ago

If sinA=√3-1/2√2,then prove that cos2A=√3/2 prove that

Ivan

Answer:

$\boxed{\sf cos2A =\dfrac{\sqrt3}{2}}$

Step-by-step explanation:

Here we are given that the value of sinA is √3-1/2√2 , and we need to prove that the value of cos2A is √3/2 .

<u>Given</u><u> </u><u>:</u><u>-</u>

• $\sf\implies sinA =\dfrac{\sqrt3-1}{2\sqrt2}$

<u>To</u><u> </u><u>Prove</u><u> </u><u>:</u><u>-</u><u> </u>

• $\sf\implies cos2A =\dfrac{\sqrt3}{2}$

<u>Proof </u><u>:</u><u>-</u><u> </u>

We know that ,

$\sf\implies cos2A = 1 - 2sin^2A$

Therefore , here substituting the value of sinA , we have ,

$\sf\implies cos2A = 1 - 2\bigg( \dfrac{\sqrt3-1}{2\sqrt2}\bigg)^2$

Simplify the whole square ,

$\sf\implies cos2A = 1 -2\times \dfrac{ 3 +1-2\sqrt3}{8}$

Add the numbers in numerator ,

$\sf\implies cos2A = 1-2\times \dfrac{4-2\sqrt3}{8}$

Multiply it by 2 ,

$\sf\implies cos2A = 1 - \dfrac{ 4-2\sqrt3}{4}$

Take out 2 common from the numerator ,

$\sf\implies cos2A = 1-\dfrac{2(2-\sqrt3)}{4}$

Simplify ,

$\sf\implies cos2A = 1 -\dfrac{ 2-\sqrt3}{2}$

Subtract the numbers ,

$\sf\implies cos2A = \dfrac{ 2-2+\sqrt3}{2}$

Simplify,

$\sf\implies \boxed{\pink{\sf cos2A =\dfrac{\sqrt3}{2}} }$

Hence Proved !

8 0

2 years ago

Help pls And thanks

hoa [83]

Answer:

I think that 110 would be the correct answer. PLEASE correct if I'm wrong.

Step-by-step explanation:

See, a 90 degree angle is a right angle or like one of the ways you can split a square in half. l

So since that is a little more than a 90 degree angle, I would guess it would be 110.

6 0

2 years ago

Read 2 more answers

WHAT IS HELP PLEASE <br><br> 6x2 -2x3 +x4 =?<br> DONT ANSWER TO GET QUICK POINTS

blondinia [14]

Answer:

i told you in the comment it equals 7

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Think: 43 tens x 3 tens =

Vlad1618 [11]

43 tens x 3 tens is 129 hundreds

5 0

3 years ago