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3 years ago

These are the values in Min-Su’s data set.

Mathematics

1 answer:

Ber [7]3 years ago

3 0

The answer is (4,5) (5,-5) (6,-4) (7,3) (8,1).

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The square root 30 lie between what two numbers

Debora [2.8K]

The square root of thirty lies between the numbers 5 and 6.

8 0

3 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 .

Given :-

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

To Prove :-

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

Proof :-

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

3 years ago

Can somebody help me with this?

miv72 [106K]

Answer:

Its y=1/2x +2(the second one)

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Someone please help me with two answer choices

otez555 [7]

Answer:

It is the first and the last three.

7 0

3 years ago

1.2and 1.4 which one bigger

Hitman42 [59]

Isn't it 1.4 because I'm thinking its 1,400 and 1.2 is 1,200

4 0

3 years ago