227k views
23 votes
Work out length of ac using cosine rule

Work out length of ac using cosine rule-example-1

1 Answer

4 votes

Answer:

AC=14.8 cm

Explanation:

AC^2=AB^2 +BC^2 -2(AB×BC×cos(ABC))

AC^2=7^2 +10^2 -2(7×10×cos(120))

AC^2=219

AC=sqrt(219)= 14.8 cm

User Ryan Francesconi
by
8.3k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories