In ABC, AB = x cm, BC = 5 cm, AC = (10 x) cm. a.
Question:
In △ABC, AB = x cm, BC = 5 cm, AC = (10 − x) cm.
a. Show that
b. Given that cos ∠ABC = −1/7 , work out the value of x.
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a To show that angle ABC is equal to 4x 152x we can use the Law of Cosines According to the Law of C...View the full answer
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Related Book For 
Edexcel AS And A Level Mathematics Pure Mathematics Year 1/AS
ISBN: 9781292183398
1st Edition
Authors: Greg Attwood
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