Q82 · Practice questionTechnology-activeSimple familiar3 marks
QUESTION 82 (3 marks)
From point , landmark is km away and landmark is km away. The angle is , as shown. Determine to the nearest km.
WORKED SOLUTION
3 marksPractice marking scheme
ANSWER
Worked solution
By the cosine rule, km, so km.
Selects the cosine rule.
Substitutes the two side lengths and included angle correctly.
Obtains km.
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