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H Intro to Cal Final Exam Review Spring 13.tst

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51) Find the exact value of the expression.cos 5π12 sin π 4 - cos π 5πsin4 12A) 1 4B) 1 2C)32D) 152) Solve the equation on the interval [0, 2π).cos2 x + 2 cos x + 1 = 0A) π 4 , 7π B) π 42 , 3π 2C) π D) 2π53) Use the given information <strong>to</strong> find the exact value of the expression.Find cos 2θ. sin θ = 7 , θ lies in quadrant I.25A) 336625B) 528625C) - 527625D) 52762554) Solve the equation on the interval [0, 2π).cos x = sin xA) π 4 , 7π 4B) π 4 , 5π 4C) 3π 4 , 7π 2D) 3π 4 , 5π 455) Solve the equation on the interval [0, 2π).cos 2x =32A) π 2C) π 6 , 11π6B) 3π 2D) π 12 , 11π12 , 13π12 , 23π1256) Solve the equation on the interval [0, 2π).2 cos2 x + sin x - 2 = 0A) π 6 , 5π 6B) π 3 , 2π 3C) π 2 , 3π 2 , π 3 , 2π 3D) 0, π, π 6 , 5π 657) Complete the identity.(cot x + 1)(cot x + 1) - csc2 x= ?cot xA) 1 B) 0 C) 2 D) cot x58) Use substitution <strong>to</strong> determine whether the given x-value is a solution of the equation.cos x + 1 = sin x, x = 5π 4A) Yes B) No12

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