Simplify the expression.1 - 
A. cos2x
B. cot x csc x
C. tan x sec x
D. sin2x
Answer: A
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Find the amount that will be in an account, given the stated conditions.P = $14,000, t = 9, r = 11% compounded semiannually
A. $34,787.23 B. $35,812.52 C. $36,700.53 D. $22,700.53
Find the center and the radius of the circle.x2 + y2 - 6x = -14y - 42
A. (4, -8); r = 4 B. (3, -7); r = 5 C. (6, -7); r =4 D. (3, -7); r = 4
Solve the equation using the square root property.(2x - 5)2 - 81 = 0
A. {2, -7} B. {4, -14} C. {7, -2} D. {14, -4}
Solve the problem.Find a formula for the viewing area of a television screen in terms of its diagonal d and the angle ? shown in the figure. Write the formula using a single trigonometric function. Use the formula to find the viewing area for a 34-in.-diagonal television for which 
Round to the nearest tenth. 
A. A = d2 cos(2?); 236.4 in.2
B. A = d2 sin(2?); 1,131.6 in.2
C. A = 
sin(2?); 565.8 in.2
D. A = 
cos(2?); 118.2 in.2