3 years ago

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

Mathematics

2 answers:

11Alexandr11 [23.1K]3 years ago

3 0

Answer:

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

Jet001 [13]3 years ago

3 0

Answer:b

hope this helps

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