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3 years ago

I need help ASAP will give brainlyest if right

Mathematics

2 answers:

m_a_m_a [10]3 years ago

3 0

Answer:

15a⁸b⁴/5a⁴b=3a⁴b³

...........

UkoKoshka [18]3 years ago

3 0

Second choice: 3a^4b^3

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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:

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

4 0

1 year ago

Please answer correctly !!!!!! Will mark brainliest answer !!!!!!!!!!

Rasek [7]

Answer:

see below

Step-by-step explanation:

1. 0 = (r + 1)(r + 8)

Using Zero Product Property, r = -1, r = -8

2. h(r) = (r + 1)(r + 8)

= r² + 9r + 8

= (r + 9/2)² - 81/4 + 8

= (r + 4.5)² - 12.25 (Complete the square)

Vertex: (-4.5, -12.25)

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3 years ago

Francine has $4.35 in dimes and quarters. The number of dimes is five more than the number of quarters. How many of each coin do

Leya [2.2K]

344676 I hope that helps

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4 years ago

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Which number can each term of the equation be multiplied by to eliminate the fractions before solving? -3/4m-1/2=2+1/4m

Wittaler [7]

Answer:

* 2/3 / formula then multiply the numbers then you get the answer

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3 years ago

Help asappppp hbshhshshhshshsshshshs

SVEN [57.7K]

9 on the top as well so 9 x 2 18 3x2 6 3

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3 years ago