An equation with a restriction on x is given. This is the equation of the terminal side of an angle ? in standard position. Sketch the smallest positive such angle ?, and use your sketch to find the values of the indicated trigonometric functions. Rationalize denominators when applicable.4x - 9y = 0, x ? 0
Find sin ? and cot ?.
A. sin ? = 
; cot ? = 
B. sin ? = 
; cot ? = 
C. sin ? = - 
; cot ? = 
D. sin ? = - 
; cot ? = - 
Answer: B
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Find the focus and the directrix of the parabola.-2y2 - 12y - 14 - x = 0
A. Focus: 
; directrix: x = 
B. Focus: (-7, 4); directrix: x = -9
C. Focus: 
; directrix: y = 
D. Focus: 
; directrix: x = 
Determine the real solutions to the system of nonlinear equations.4x2 - 4y2 = 484x2 + 2y2 = 72
A. (4, 2), (-4, 2), (4, -2), (-4, -2) B. (4, -2), (4, 2) C. (4, 2), (2, 4), (-4, -2), (-2, -4) D. (-4, -2), (-2, -4)
Solve the problem.The parking lot at a grocery store has 72 cars in it. 50% of the cars are two-toned. How many cars are two-toned?
A. 36 cars B. 14 cars C. 144 cars D. 360 cars
Evaluate -x for the given value of x.x = 0.506
A. 3.1416 B. -0.506 C. -3.1416 D. 0.506