sageblightnoceda sageblightnoceda

Today at 5:46 AM
Mathematics

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work out length of ac using cosine rule

work out length of ac using cosine rule class=

Answer :

jaafarkadi5 jaafarkadi5

Today at 5:51 AM

Answer:

AC=14.8 cm

Step-by-step 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

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