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Brums [2.3K]
3 years ago
9

Which of these is equal to cos 47Á? A) cos 43Á B) sin 43Á C) tan 43Á D) cos 133Á

Mathematics
2 answers:
andreyandreev [35.5K]3 years ago
8 0
Correct answer is B.

\alpha+\beta=90^o
\\ \cos{\alpha}=\sin{(90^o-\alpha)}
\\ \cos{47^o}=\sin{(90^o-47^o)}=\sin{43^o}
JulijaS [17]3 years ago
6 0
I believe the answer is B.
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Plz Help!!! I need this Asap. Plz give an explanation and no guessing only answer if you know.
borishaifa [10]

Answer:

<h2>50°</h2>

Step-by-step explanation:

AB = AC

So, it is a isosceles triangle.

<B = <C = 65°

Sum of angles of triangle = 180°

< A + < B + <C = 180°

plug the values:

X + 65° + 65° = 180°

Calculate the sum

X + 130° = 180°

Move constant to R.H.S and change its sign

x = 180° - 130°

Calculate the difference

X = 50°

Hope this helps...

Good luck on your assignment...

7 0
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sergey [27]

Answer:

the answer is D:5040

Step-by-step explanation:

7 0
2 years ago
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Roses normally cost $19.00 a dozen, but for Valentine's Day the price goes up to $35.00. What is the difference in price, includ
JulijaS [17]

Answer:

$17.12

Step-by-step explanation:

First let's find the normal cost with tax

7/100*19=133/100=$1.33

$19+$1.33=$20.33

Now we find the cost with tax for the Valentine's Day price

7/100*35=$2.45

$35+$2.45=$37.45

Now we subtract the normal cost from the Valentine's Day price

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4 0
3 years ago
Dave works 5 hours at double time. He earns $98.00. Find his normal hourly rate?
Evgesh-ka [11]

Answer:

You just divide the numbers to get the hourly pay.

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Answer:

12.

m∠ACB = 180° - 58° - 78° = 44°

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13.

Base on the picture, we know that:

x° + 2x° + 3x° = 180°

6x°                 = 180°

x°                   =  180° ÷ 6 = 30°

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=> m∠KML = x° = 30°

m∠LMN =  60° + 90° = 150°

5 0
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