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lara [203]
3 years ago
12

Solve sin x + 2 sin x cos X = for 0°

Mathematics
1 answer:
solniwko [45]3 years ago
3 0

Answer:

Step-by-step explanation:

hello :

sin x + 2 sin x cosx = 0   equivalent to : sinx(1+2cosx) =0

sinx=0 means :  general solution is  : x= kπ....k in Z

1+2cosx=0  means : cosx= -1/2 general solution is : x= ±π/6+kπ...k in Z

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Will mark brainliest!!!! Please answer correctly, the questions are in the picture.
zhenek [66]

Answer:

1. A

2. B

Step-by-step explanation:

1. Only option A creates that graph, the other options are either backwards or are on top of each other.

2. Because the two lines are parallel, and do not intersect at all, there will be 0 solutions.

4 0
2 years ago
Whats a integer ,can someone answer this a short explanation ?
madreJ [45]

Answer:

An Integer is a whole number

Step-by-step explanation:

Integers can be positive, negative, and even zero.

Integers can't be fractions, decimals, ect.

An example of some Integers are:

1, 2, 3, 0, -1, -2 , -3

Hope this helps you out!

3 0
2 years ago
Read 2 more answers
5.<br> Put the following fractions in order from smallest to largest: 1/4, 2/3, 4/7, 1/2
AVprozaik [17]

Answer:

4/7, 1/4,1/2, 2/3

Step-by-step explanation:

7 0
3 years ago
Solve the given triangles by finding the missing angle and other side lengths.
coldgirl [10]

Answer:

  1. a ≈ 27.65; B = 28°; c ≈ 19.17
  2. a ≈ 163.30; B = 120°; c ≈ 59.77
  3. A = 13°; b ≈ 0.3874; c ≈ 1.3737

Step-by-step explanation:

As long as you're seeking outside help, the use of a suitable tool is appropriate. Many graphing calculators, apps, and web sites are available for solving triangles.

__

Here, you're given two angles and a side. The third angle is the difference from 180° of the sum of the other two. For example, in the first problem, ...

  B = 180° -A -C = 28°

The missing sides are found using the law of sines. Since you are given a side, use that as the reference, and its opposite angle as the reference angle. Then you have ...

  side = sin(opposite angle)×<em>((reference side)/sin(reference angle))</em>

Note that the factor in italics remains the same for both remaining sides.

__

In the first problem, this becomes ...

  a = sin(112°)·14/sin(28°) ≈ 27.65

  c = sin(40°)·14/sin(28°) ≈ 19.17

__

The remaining problems are worked in similar fashion.

_____

<em>Comment on triangle solutions</em>

These are straightforward because you're given two angles. If you're given two sides and an angle, the solution method varies depending on which angle you're given (opposite the long side, the short side, or the unknown side). In the last case, the law of cosines is involved. In the second case, there are likely two solutions. Once you have two angles, you can proceed as above.

8 0
2 years ago
Read 2 more answers
Anyone help me pzzzzzzzzz
Marina86 [1]

The x values are the domain and they y values are the range. So the domain is {-2, 0, 2}. And the range is {-1, 0, 1}. So B is the answer.

4 0
3 years ago
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