Question

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

Answer 1

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 = $\sqrt{3.0382}$ = 1.7 → A

Answer 2

Answer:b

hope this helps