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kompoz [17]
3 years ago
10

Find all solutions to the equation. cos^2x + 2 cos x + 1 = 0

Mathematics
1 answer:
garri49 [273]3 years ago
3 0

Answer:

take a picture of the problem

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Solve |2x - 5| = 4 I dont know what you solve for
ICE Princess25 [194]

Hello!

Answer:

\huge\boxed{x = 1/2, 9/2}

|2x - 5| = 4

Solve for the negative and positive expressions:

2x - 5 = 4

2x = 9

x = 9/2

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

-(2x - 5) = 4

-2x + 5 = 4

-2x = -1

x = 1/2.

Therefore, the solutions are x = 1/2 and 9/2.

6 0
3 years ago
What are the unit rates for  4/8 , 5/25, 36/6, 14/21, 18/30, 28/16, 56/35, 45/108, 12/42, 39/26
Artyom0805 [142]
How you find those is you just divide the rate and what ever answer you get you add a one on the bottom

Example: 1. 4/8
2.4÷8= 2
3. 2/1
5 0
3 years ago
Can someone pls do these quick
balu736 [363]

Answer:

6. x° is approximately 21.04°

7. x° is approximately 39.56°

8. x° is approximately 58.03°

9. x° is approximately 72.85°

Step-by-step explanation:

6. In the given right triangle (a triangle with the measure of one of the interior angles equal to 90°, indicated by the small square between two sides) , we have;

The hypotenuse side length = 15

The adjacent side to the given reference angle, x° = 14

By trigonometric ratio, we have;

cos\angle X = \dfrac{Adjacent\ leg \ length}{Hypotenuse \ length}

\therefore cos(x^{\circ}) = \dfrac{14}{15}

To find the value of x°, we make use of the inverse cosine function, arccos found on a scientific calculator, as follows;

x° = arccos(14/15) ≈ 21.04°

x° ≈ 21.04°

7. In the given right triangle, we have;

The length of the opposite side to the given reference angle, x° = 19

The length of the adjacent side to the given reference angle, x° = 23

By trigonometric ratios, we have;

Tan(\angle X) = \dfrac{Opposite \, side \  length}{Adjacent\, side \ length}

\therefore tan(x^{\circ}) =  \dfrac{19}{23}

Therefore;

x° = arctan(19/23) ≈ 39.56°

x° ≈ 39.56°

8. In the given right triangle, the adjacent side to the reference angle, x° and the hypotenuse side are given, therefore, we have;

x° = arccos(9/17) ≈ 58.03°

x° ≈ 58.03°

9. The opposite side to the reference angle and the hypotenuse side are given

By trigonometric ratio, we have;

sin\angle X = \dfrac{Opposite \ leg \ length}{Hypotenuse \ length}

\therefore sin(x^{\circ}) = \dfrac{43}{45}

x° = arcsin(43/45) ≈ 72.85°

x° ≈ 72.85°.

6 0
2 years ago
ANSWER NEEDED ASAP!!!!!!!!
Alexxx [7]

1. 428 pages: <em>There are a total of 428 pages</em> that you can flip to.

2. 1/428: Page 45 is <em>only one page out of the total sample space</em>.

3. 1/2: Since the last page is 428, there is an even number of pages. That means that there are<em> 214 page numbers that are even</em>. <em>214/428 = 1/2</em>.

8 0
3 years ago
Read 2 more answers
The numbers produced are ?, ?, ?, and ?. Thanks!
tiny-mole [99]
5 is the answer 5 times 4 is 20
4 0
3 years ago
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