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jwbri jwbri
  • 04-01-2020
  • Mathematics
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TRIG. HELP GIVE BRAINLEST AND EARN POINTS​

TRIG HELP GIVE BRAINLEST AND EARN POINTS class=

Respuesta :

jimrgrant1 jimrgrant1
  • 04-01-2020

Answer:

c ≈ 4.2 ft

Step-by-step explanation:

Using the cosine rule with a = 7, b = 8 and C = 32°, then

c² = 7² + 8² - (2 × 7 × 8 × cos32°)

   = 49 + 64 - (112 × cos32°)

   = 113 - 94.98

c = [tex]\sqrt{113-94.98}[/tex] ≈ 4.2 ft ( to the nearest tenth )

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