MCQ

M4949 · [1]
In triangle ABC, AB = 10 cm, BC = 7 cm and angle BAC = 40 degrees. Angle ACB is obtuse. What is the length of AC?
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A solid cone has base radius 5 cm and slant height 13 cm . The total surface area of the cone, in cm^2 , is
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State the cosine rule for cos A . [2]
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