In the problem, sin ? and cos ? are given. Find the exact value of the indicated trigonometric function.sin ? = 
, cos ? = 
Find csc ?.
A. 
B. 
C. 
D. 
Answer: B
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Solve the problem. Assume the x-axis is horizontal, the positive y-axis is vertical (opposite g), the ground is horizontal, and only the gravitational force acts on the objects. A projectile is launched from the origin at an angle of ? radians to the horizontal and an initial speed of 
Find the position function r(t) for this projectile.
A. r(t) = (50t sin ?)i + (50t cos ? - 16t2)j B. r(t) = (50t cos ? - 32t2)i + (50t sin ?)j C. r(t) = (50t cos ?)i + (50t sin ? - 16t2)j D. r(t) = (50t sin ? - 16t2)i + (50t cos ?)j
Solve the system of equations.-0.2x + 0.3y - 0.2z = 1.6-0.4x - 0.3y + 0.2z = 0.80.2x - 0.4y + 0.3z = -1.9
A. (0.6, 4, 0) B. (0.8, 2, 0) C. (0.6, 2, -1) D. (-4, 2, -1)
Divide. Express your answer in simplest form.
÷ 
A. 
B. -1
C. 
D. 
Find an equation of a parabola satisfying the given conditions.Focus at (0, 3?), directrix y = -3?
A. x2 = 3?y B. y2 = 4?x C. x2 = 12?y D. y2 = 12?x