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Lady_Fox [76]
3 years ago
15

Prove that: sin8A/1-cos8A=cot4A​

Mathematics
1 answer:
nikitadnepr [17]3 years ago
8 0

Step-by-step explanation:

Recall the identity

\tan \frac{A}{2}= \dfrac{1 - \cos A}{\sin A}

We can see that

\dfrac{\sin 8A}{1 - \cos 8A} = \dfrac{1}{\tan 4A}= \cot 4A

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Please help!!! I will give brainliest but only if you try and help.
Slav-nsk [51]

Answer:

<h2>____</h2><h3>1260 </h3><h2>____</h2>

Since we have to predict, we can use ratios to help us solve this.

12 said yes out of 72 randomly chosen, SO,

if 210 would say yes (goes to play), how many is total??

12 is to 72 AS 210 is to HOW MUCH (let it be x)??

We can setup ratio, cross multiply, and solve for x:

= 12/72= 210/x

= 12x = 210*72

=12x = 15,120

=x = 15,120/12

<h2>=x =1260</h2>

8 0
3 years ago
If the length and width of a rectangle quadruple what happens to the area
natta225 [31]
A = hw
Replace h with 4h
Replace w with 4w
A = (4w)(4h)
= 16hw

The area becomes 16 times larger.

Have an awesome day! :)
8 0
4 years ago
If you were to solve this inequality,<br> do you need to flip the Inequality symbol?
Pavlova-9 [17]

Answer: no

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8 0
3 years ago
Read 2 more answers
In exercises 1 and 2, Find the value of x.
Kruka [31]

From the given picture, we can see that 2 sides are congruen, then the given triangle is an isosceles triangle. In this triangle the base angles are congruent, so we can draw the following picture:

Now, since interior angles of any triangle add up to 180 degrees, we have

x+\frac{x}{2}+\frac{x}{2}=180

By combining similar terms, we get

\begin{gathered} \frac{4}{2}x=180 \\ 2x=180 \end{gathered}

Then, x is given as

\begin{gathered} x=\frac{180}{2} \\ x=90 \end{gathered}

Therefore, the answer is x=90 degrees

4 0
1 year ago
Anyone for 10 points??!!!<br> The question is in the image<br> Thanks But answer ASAP!
ivanzaharov [21]
Bottom Side Surface Area:

(24 inches + 24 inches + 24 inches) * (30 inches)

= 72 inches * 30 inches

= 2160 inches squared


--------

Top Side Surface Area:

24 inches * 30 inches

= 720 inches squared

--------

Length of the diagonal (D) which needs to be measured:

*Use Pythaogras's theorem...

24^2 + 10^2 = D^2

D=√(24^2+10^2)

D=26 inches

------------

Measure the surface area of the two ramps:

26 inches * 30 inches * 2

= 1560 inches squared

-----------

Total surface area:

2160 inches squared + 720 inches squared + 1560 inches squared

= 4440 inches squared

---------

Answer:

4440 square inches
8 0
3 years ago
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