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allsm [11]
2 years ago
8

Find the length of side BC. Give your answer to 3 significant figures. C A 71° B

Mathematics
2 answers:
lana66690 [7]2 years ago
5 0

Answer:

19.4°

Step-by-step explanation:

I put the image of how I did it if you don't understand let me know

Vikki [24]2 years ago
4 0

Answer:

BC ≈ 19.4 cm

Step-by-step explanation:

using the cosine ratio in the right triangle

cos71° = \frac{adjacent}{hypotenuse} = \frac{AB}{BC} = \frac{6.3}{BC} ( multiply both sides by BC )

BC × cos71° = 6.3 ( divide both sides by cos71° )

BC = \frac{6.3}{cos71} ≈ 19.4 cm ( to 3 sig. figs )

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yanalaym [24]

Answer:

540°.

Step-by-step explanation:

On a unit circle, cos θ = -1 at 180°.

However, cos θ has a period of 2π, or 360°. This means that cos θ will equal to -1 again after 2π.

To solve for the angle:

180° + 360° = 540°. This is the next angle at which cos θ = -1.

7 0
3 years ago
Read 2 more answers
Anyone know the answer?
balu736 [363]

Answer:

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5 0
3 years ago
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Aleksandr [31]

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4=-2+b

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D. 6


Hope this helps!!

7 0
3 years ago
The circumference of a circle is 18.84 inches. what is the circle's radius
vivado [14]

Answer:

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6 0
3 years ago
What is the ratio of the number of days in the week that do not begin with the letter "T" to the number of days in the week that
serg [7]

Answer:

5:7

Step-by-step explanation:

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3 years ago
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