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nadezda [96]
3 years ago
5

Use the triangle shown on the right to answer the question. According to the law on sines, which of the following statement(s) a

re true ? Check all that apply

Mathematics
2 answers:
lubasha [3.4K]3 years ago
4 0
<h2>Answer:</h2>

The statements which are true are:

  • a\sin B=b\sin A
  • \dfrac{a}{\sin A}=\dfrac{b}{\sin B}
  • \dfrac{b}{\sin B}=\dfrac{c}{\sin C}
<h2>Step-by-step explanation:</h2>

In Trigonometry, the Law of Sine relates the length of sides of a triangle to the angle of a triangle.

According to this law if a,b and c are the sides of a triangle and A,B and C  respectively are opposite angles to the side.

Hence, we have:

\dfrac{a}{\sin A}=\dfrac{b}{\sin B}=\dfrac{c}{\sin C}

i.e. we have:

\dfrac{a}{\sin A}=\dfrac{b}{\sin B}

This could also be given by:

a\sin B=b\sin A

\dfrac{b}{\sin B}=\dfrac{c}{\sin C}

Lelechka [254]3 years ago
3 0

Answer:

See below.

Step-by-step explanation:

The law of sines is usually written as a / sin A = b / sin b == c / sin C    where a is the side opposite angle A ,etc.

The first equation is true because it is obtained by cross multiplying

a / sin A = b / sin B,  therefore   b sin A = a sin B.

The second one is not true.

The third and fourth are both true.

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a.\ m=2,\ \text{the line is rising}\\\\b.\ m=-\dfrac{5}{4},\ \text{the line is falling}\\\\c.\ m=0,\ \text{the line is horizontal}\\\\d.\ m\ is\ unde fined,\ \text{the line is vertical}

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The formula of a slope:

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m < 0, then a line is falling

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m is undefined, then a line is vertical

<h2>a.</h2>

(2, 1) and (4, 5)

m=\dfrac{5-1}{4-2}=\dfrac{4}{2}=2>0\to\text{rising}

<h2>b.</h2>

(-1, 0) and (3, -5)

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<h2>c.</h2>

(2, 1) and (-3, 1)

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<h2>d.</h2>

(-1, 2) and (-1, -5)

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