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3 years ago

NEED HELP ASAP, TEST!! Solve the equation 2 cos (x) +1=0,0 ≤ x ≤ 2pi. Show all of your work.

Mathematics

1 answer:

Viefleur [7K]3 years ago

3 0

Answer: $cos(x) = -\frac{1}{2}$

Work:

1. Subtract 1 from both sides

$2cos(x)+1-1=0-1$

2. Simplify

$2cos(x)=-1$

3. Divide both sides by 2

$\frac{2cos(x)}{2}=\frac{-1}{2}$

4. Simplify

$cos(x)=-\frac{1}{2}$

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Whats the area of this shape?

vodomira [7]

The area of the shape shown in the image which is in the shape of kite figure is 168 squared centimeters.

<h3>What is the area of the kite figure?</h3>

The area of the kite figure is half of the product of its diagonals. Area of kite figure can be find out using the following formula.

$A=\dfrac{pq}{2}$

Here, p and q are the diagonals of the kite.

The length of the first diagonal of the kite figure is,

p=6+15

p=21 cm

The length of the second diagonal of the kite figure is,

q=8+8

q=16 cm

Thus, the area of kite figure is:

$A=\dfrac{21\times16}{2}\\A=\dfrac{21\times16}{2}\\A=168\rm\; cm^2$

Thus, the area of the shape shown in the image which is in the shape of kite figure is 168 squared centimeters.

Learn more about the area of kite here;

brainly.com/question/16424656

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2 years ago

The same architect wants to draw a room that has an area of 175 ft². What will be the area of the room in his drawing in square

Dominik [7]

Answer:

25,200in²

Step-by-step explanation:

The architect wants to draw a room that has an area of 175 ft². We need to find this measurement in square inches.

<u>Square feet and square inches are different from feet and inches. </u>

We should know that a square foot is 144 square inches.

Multiply 175 * 144.

$175 * 144=25200$

So the same architect wants to draw a room that should have an area of 25,200in².

<em>Brainilest Appreciated. </em>

3 0

3 years ago

Simplified form of 11[(9^2-5^2)/2^2+8]<br> A.224.5<br> B.242<br> C.51.3<br> D.110

aleksandr82 [10.1K]

B. 242
th answer is b

7 0

4 years ago

Read 2 more answers

Find all integers $n$ for which $\frac{n^2+n+1}{n-1}$ is an integer.

Grace [21]

$\dfrac{n^2+n+1}{n-1}=\dfrac{(n-1)^2+3(n-1)+3}{n-1}=n-2+\dfrac3{n-1}$

The remainder term $\dfrac3{n-1}$ will never vanish, and will always be rational as long as the denominator is not 1, 3, or -3.

$n-1=1\implies n=2$
$n-1=3\implies n=4$
$n-1=-3\implies n=-2$

7 0

3 years ago

Round to estimate the quotient 715÷11

SashulF [63]

Answer: 63.63

Step-by-step explanation: Hope this helps. G'day mate!

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3 years ago

NEED HELP ASAP, TEST!! Solve the equation 2 cos (x) +1=0,0 ≤ x ≤ 2pi. Show all of your work.​

NEED HELP ASAP, TEST!! Solve the equation 2 cos (x) +1=0,0 ≤ x ≤ 2pi. Show all of your work.