jakerich
jakerich jakerich
  • 15-05-2019
  • Mathematics
contestada

Solve for x in the triangle
A 1.7
B 2.6
C 2.7
D 3.0

Solve for x in the triangle A 17 B 26 C 27 D 30 class=

Respuesta :

jimrgrant1 jimrgrant1
  • 15-05-2019

Answer:

A

Step-by-step explanation:

Given 2 sides and the included angle use the Cosine rule to solve for x

x² = 1.6² + 1.1² - (2 × 1.6 × 1.1 × cos78° )

    = 2.56 + 1.21 - ( 3.52 × cos78° )

   = 3.77 - 0.7318

   = 3.0382

Take the square root of both sides

x = [tex]\sqrt{3.0382}[/tex] = 1.7 → A

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