valeriaportillow703q
valeriaportillow703q valeriaportillow703q
  • 12-07-2020
  • Mathematics
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CAN SOMEONEHELP PLS ASAP

CAN SOMEONEHELP PLS ASAP class=

Respuesta :

jimrgrant1 jimrgrant1
  • 12-07-2020

Answer:

a ≈ 2.2

Step-by-step explanation:

Using the Cosine rule in Δ ABC

a² = b² + c² - 2bc cos A

Here b = 3, c = 4 and A = 32° , thus

a² = 3² + 4² - (2 × 3 × 4 × cos32° )

    = 9 + 16 - 24cos32°

    = 25 - 24cos32° ( take the square root of both sides )

a = [tex]\sqrt{25-24cos32}[/tex] ≈ 2.2

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