meredith48034
meredith48034 meredith48034
  • 12-05-2020
  • Mathematics
contestada

using the laws of cosines, round to the nearest tenths​

using the laws of cosines round to the nearest tenths class=

Respuesta :

amna04352
amna04352 amna04352
  • 12-05-2020

Answer:

1. 16.8 ft

2. 39.4 ft

3. 50.9 cm

4. 14.4 m

Step-by-step explanation:

1. X² = 15² + 7² - 2(15)(7)cos92

X² = 281.3288943

X = 16.77286184

2. AB² = 25² + 30² - 2(25)(30)cos91

AB² = 1551.17861

AB = 39.38500488

3. AB² = 24.4² + 29.4² - 2(24.4)(29.4)cos142.1

AB² = 2591.834718

AB = 50.910065

4. BC² = 13.1² + 10.3² - 2(13.1)(10.3)cos74.8

BC² = 206.9456283

BC = 14.3856049

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