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juin [17]
2 years ago
8

How do u mark a person with brainlest please acttually tell me

Mathematics
1 answer:
ruslelena [56]2 years ago
7 0

Answer:

this is how you do it.. press the crown button in an answer

Step-by-step explanation:

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Triangle ABC is a non-right triangle with Angle C = 117, a = 12, and b = 18. Find Angle B to the nearest tenth.
qwelly [4]

Using the law of cosines and sines, the measure of angle B is: 38.4°.

<h3>What is the Law of Cosines and Sines?</h3>

Law of cosines is: c = √[a² + b² ﹣ 2ab(cos C)]

Law of sines is: sin A/a = sin B/b = sin C/c

Use the law of cosines to find c:

c = √[12² + 18² ﹣ 2(12)(18)(cos 117)]

c ≈ 25.8

Use the law of sines to find angle B:

sin B/b = sin C/c

sin B/18 = sin 117/25.8

sin B = (sin 117 × 18)/25.8

sin B = 0.6216

B = sin^(-1)(0.6216)

B = 38.4°

Learn more about the law of cosines on:

brainly.com/question/23720007

#SPJ1

5 0
1 year ago
Find all solutions to the equation.<br><br> cos^2x + 2 cos x + 1 = 0
natali 33 [55]

\bf cos^2(x)+2cos(x)+1=0\implies \stackrel{\textit{let's notice, this is simply }ax^2+bx+c=0}{[cos(x)]^2+2cos(x)+1=0} \\[2em] [cos(x)+1][cos(x)+1]=0 \\\\[-0.35em] ~\dotfill\\\\ cos(x)+1=0\implies cos(x)=-1\implies x=cos^{-1}(-1)\implies \stackrel{\textit{for the range }[0,2\pi ]}{x=\pi } \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill \stackrel{\textit{all solutions}}{x=\pi +2\pi n~~,~~ n \in \mathbb{Z}}~\hfill

6 0
3 years ago
Consider the similarity transformation of ΔABC to produce ΔEDF.
iogann1982 [59]
ABC rotates 90 degrees clockwise to become EDF.

ABC undergoes transformation of 1/2 so reduces its original size.
6 0
3 years ago
Rewrite in simplest radical form, thx :)
Aleks [24]

Answer:

The answer is

\sqrt[3]{ {x}^{2} }

Step-by-step explanation:

\frac{ {x}^{ \frac{5}{6} } }{ {x}^{ \frac{1}{6} } }

Since they have the same base and are dividing we can use the rules of indices

That's

subtract the exponents

So we have

{x}^{ \frac{5}{6} -  \frac{1}{6}  }

{x}^{ \frac{4}{6} }

=  {x}^{ \frac{2}{3} }

Rewriting it in radical form

We have the final answer as

\sqrt[3]{ {x}^{2} }

Hope this helps you

6 0
3 years ago
PLS HELP with this from khan academy. I’m struggling, and it’s due today.
Masteriza [31]

Answer:

8

Step-by-step explanation:

You can think as vertices as the corners of the shape

7 0
3 years ago
Read 2 more answers
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