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karissanichole18
20.11.2020 •
Mathematics
During a war, Country A led a massive assault on the beach of Country B. The beach is 6.4 miles long. At 5 AM, a ship was first spotted from either end of the beach. The angle made with the ship from one end of the beach was 47°. The angle made with the ship from the other end of the beach was 71°. Determine the distance from the ship to either end of the beach at the moment the ship was first spotted.
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Ответ:
5.3 miles & 6.85 miles
Step-by-step explanation:
To solve this question, I would use the sine rule
a/Sine A = b/Sine B = c/Sine C
Making a rough sketch, I have a scalene triangle with angles 47° and 71°, by default, the third angle is 61°
Given that, from my rough sketch
Angle C = 62°
Angle B = 71°
Angle A = 47°
Side c = 6.4 miles
We're looking for dudes a and b, applying our formula, we have
a/Sine 47 = 6.4/Sine 62
a/0.7314 = 6.4/0.8829
a/0.7314 = 7.25
a = 7.25 * 0.7314
a = 5.3 miles
b/Sine 71 = 6.4/Sine 62
b/0.9455 = 6.4/0.8829
b/0.9455 = 7.25
b = 7.25 * 0.9455
b = 6.85 miles
Ответ:
Step-by-step explanation: