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2 years ago

HELPPPPPP PLEASEEEEEEE

Mathematics

1 answer:

azamat2 years ago

6 0

Add up the subtended arcs that these chords cut to get

44+86 = 130

Then divide that result by 2

130/2 = 65

Final Answer: choice A) 65 degrees

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Rewrite 9cos 4x in terms of cos x.

rosijanka [135]

$\bf \qquad \textit{Quad identities}\\\\
sin(4\theta )=
\begin{cases}
8sin(\theta )cos^3(\theta )-4sin(\theta )cos(\theta )\\
4sin(\theta )cos(\theta )-8sin^3(\theta )cos(\theta )
\end{cases}
\\\\\\
cos(4\theta)=8cos^4(\theta )-8cos^2(\theta )+1\\\\
-------------------------------\\\\
9cos(4x)\implies 9[8cos^4(x)-8cos^2(x)+1]
\\\\\\
72cos^4(x)-72cos^2(x)+9$

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

as far as the previous one on the 2tan(3x)

$\bf tan(2\theta)=\cfrac{2tan(\theta)}{1-tan^2(\theta)}\qquad tan({{ \alpha}} + {{ \beta}}) = \cfrac{tan({{ \alpha}})+ tan({{ \beta}})}{1- tan({{ \alpha}})tan({{ \beta}})}\\\\
-------------------------------\\\\$

$\bf 2tan(3x)\implies 2tan(2x+x)\implies 2\left[ \cfrac{tan(2x)+tan(x)}{1-tan(2x)tan(x)}\right]
\\\\\\
2\left[ \cfrac{\frac{2tan(x)}{1-tan^2(x)}+tan(x)}{1-\frac{2tan(x)}{1-tan^2(x)}tan(x)}\right]\implies 2\left[ \cfrac{\frac{2tan(x)+tan(x)-tan^3(x)}{1-tan^2(x)}}{\frac{1-tan(x)-2tan^3(x)}{1-tan^2(x)}} \right]
\\\\\\$

$\bf 2\left[ \cfrac{2tan(x)+tan(x)-tan^3(x)}{1-tan^2(x)}\cdot \cfrac{1-tan^2(x)}{1-tan(x)-2tan^3(x)} \right]
\\\\\\
2\left[ \cfrac{3tan(x)-tan^3(x)}{1-tan^2(x)-2tan^3(x)} \right]\implies \cfrac{6tan(x)-2tan^3(x)}{1-tan^2(x)-2tan^3(x)}$

4 0

2 years ago

Help please and thank you

kodGreya [7K]

Answer:

if I'm not mistaken it's 28

Step-by-step explanation:

x+4=32

x=28

7 0

2 years ago

Read 2 more answers

A town's yearly snowfall in inches over a 10-year period is

lianna [129]

C. 17.4 in.

You add up all the snowfall through the years, then divide it by 10 because of there being 10 numbers.

6 0

2 years ago

A youth group has 25 members. A. If at least 12 of the members are male, write an inequality to represent the number of female m

Eddi Din [679]

Answer:

x ≥ 12

y ≤ 25 - x

Step-by-step explanation:

Given:

Number of total members = 25

Number of at least male members = more than 12

Find:

Inequality

Computation:

Assume number of female members = y

So,

x ≥ 12

And

y ≤ 25 - x

8 0

2 years ago

Which property was use to simplify this expression? (will be marked brainliest)

sdas [7]

Answer:

Distributive property

Step-by-step explanation:

The distributive property tells you ...

a(b+c) = ab +ac

Here, you have a=4, c=2, so ...

4(b+2) = 4·b + 4·2 = 4b +8

5 0

3 years ago

Read 2 more answers