Use identities to simplify the expression.1 - 
A. tan ? sec ?
B. cos2 ?
C. cot ? csc ?
D. sin2 ?
Answer: B
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Solve the problem.A plane is heading due south with an airspeed of 245 mph. A wind from a direction of 53° is blowing at 13 mph. Find the bearing of the plane.
A. 93° B. 88° C. 177° D. 182°
Provide an appropriate response.Which one of the following is a description of the graph of the solution set for the system below?x2 + y2 ? 36 4x2 + 9y2 ? 36
A. The area inside the ellipse (defined by the second equation) and outside the circle (defined by the first equation), including both borders. B. The area inside the ellipse (defined by the second equation), including the border. C. The area inside the circle (defined by the first equation) and outside the ellipse (defined by the second equation), including both borders. D. None of these
Solve.x2 + 8x + 16 ? 0
A. {-4} B. (-?, -4] ? [-4, ?) C. [4, ?) D. {4}
Convert to decimal notation.
A. 0.
B. 2.1
C. 0.5
D. 0.4