Work out length of ac using cosine rule

MegZo asked Dec 19, 2023

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MegZo asked Dec 19, 2023

by MegZo

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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

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