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mario62 [17]
3 years ago
15

Solve the triangle.

Mathematics
1 answer:
Zolol [24]3 years ago
7 0

∠A = 106.3°, ∠B = 20.6°, ∠C = 53.1°

<u>Step-by-step explanation:</u>

In a ΔABC, the sides opposite to the angle A is a, angle B is b, and angle C is c. a = 60 , b= 22, c = 50

We can find any one angle by cosine rule,

a² = b² + c² - 2 bc cos (A)

60² = 22² + 50² - 2(22)(50) cos A

3600 = 484 + 2500 - 2200 cos A

3600 = 2984 - 2200 cos A

3600 - 2984 = -2200 cos A

616 = -2200 cos A

cos A = 616/ -2200 = -0.28

A = cos⁻¹ (-0.28) = 106.3°

Now we can use sine rule to find angle B as,

sin A/ a = sin B / b

sin  106.3° / 60 = sin B / 22

sin B = 22 × sin  106.3° / 60

 B = sin⁻¹ (22 × sin  106.3° / 60 ) = 20.6°

As we know the sum of angles in a triangle is 180°.

∠A + ∠B + ∠C = 180°

106.3° + 20.6° + ∠C = 180°

126.9° + ∠C = 180°

∠C = 180° - 126.9° = 53.1°

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25 ÷ (6 - 1) = 25 ÷ 5 = 5, she saved 5 nickels,

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4 0
3 years ago
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An airplane flying with the wind can cover a certain distance in 2 hours. The return trip against the wind takes 2.5 hours. Find
Anna [14]

Answer:

Wind speed = 30 mph

Plane speed = 270 mph

Step-by-step explanation:

Given that :

Distance = 600 miles

Let speed of airplane = a ; speed of wind = b

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Time taken with wind = 2 hours

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Recall :

Speed = distance / time ; distance = speed * time

(a + b) * 2 = (a - b) * 2.5

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4 0
2 years ago
What is the coordinate of the vertex? Help
Ilya [14]
Answer: (6,-20)

Explanation:
The equation f(x) = -(x-6)^2 - 20 is the same as y = -1(x-6)^2 + (-20)
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Answer:

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3 years ago
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Answer:

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3 0
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