2014 April(71H) Math Question 58

Trigonometry

- Advanced sin, cos, tan functions

58. The lengths of the sides of the triangle shown below are given in meters. Which of the following equations gives the degree measure 0 ? (Note: For any triangle, c^2 = a^2 + b^2 — 2ab cos C, where a, b, and c are the lengths of the sides opposite angles with measures A, B, and C, respectively.)

Choice F

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