3 years ago

I don't btgcygljhbihlihnjknkl;n

Mathematics

2 answers:

Digiron [165]3 years ago

7 0

Yeah honestly same it’s ok tho

jekas [21]3 years ago

6 0

Homework do be like that

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Divide 114÷7 explain the anwser

bezimeni [28]

To get the answer you must see how many times 7 can go in 114

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3 years ago

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Hi, teacher I was absent these days and I didn’t understand anything about this lesson and I need help this is not count as a te

motikmotik

Given:

There are given that the cos function:

$cos210^{\circ}=-\frac{\sqrt{3}}{2}$

Explanation:

To find the value, first, we need to use the half-angle formula:

So,

From the half-angle formula:

$cos(\frac{\theta}{2})=\pm\sqrt{\frac{1+cos\theta}{2}}$

Then,

Since 105 degrees is the 2nd quadrant so cosine is negative

Then,

By the formula:

$\begin{gathered} cos(105^{\circ})=cos(\frac{210^{\circ}}{2}) \\ =-\sqrt{\frac{1+cos(210)}{2}} \end{gathered}$

Then,

Put the value of cos210 degrees into the above function:

So,

$\begin{gathered} cos(105^{\circ})=-\sqrt{\frac{1+cos(210)}{2}} \\ cos(105^{\operatorname{\circ}})=-\sqrt{\frac{1-\frac{\sqrt{3}}{2}}{2}} \\ cos(105^{\circ})=-\sqrt{\frac{2-\sqrt{3}}{4}} \\ cos(105^{\circ})=-\frac{\sqrt{2-\sqrt{3}}}{2} \end{gathered}$

Final answer:

Hence, the value of the cos(105) is shown below:

$cos(105^{\operatorname{\circ}})=-\frac{\sqrt{2-\sqrt{3}}}{2}$

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1 year ago

Can someone please explain what they did wrong in the problem and explain how you would fix it. (8grade math)

NeX [460]

Answer:

They got their points wrong, and did the wrong quadrant.

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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They increased it by $10.

It ended up costing $60.

Hope this helps.

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