Work out length of ac using cosine rule

MegZo asked Dec 19, 2023

249,578 views

41 votes

MegZo asked Dec 19, 2023

by MegZo

2.5k points

Your comment on this question:

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

Email me at this address if my answer is selected or commented on:Email me if my answer is selected or commented on

Privacy: Your email address will only be used for sending these notifications.

22 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

Engineerchuan answered Dec 25, 2023

3.7k points

Email me at this address if a comment is added after mine:Email me if a comment is added after mine

Privacy: Your email address will only be used for sending these notifications.

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

1.6m questions

2.0m answers