Use the information given about the angle ?, to find the exact value of the indicated trigonometric function.cos ? = 
, tan ?> 0 Find sin 2?.
A. 
B. - 
C. 
D. 
Answer: D
Mathematics
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Solve.A jet plane traveling at a constant speed goes 1200 miles with the wind, then turns around and travels for 1000 miles against the wind. If the speed of the wind is 50 mph and the total flight took 4 hours, find the speed of the plane in still air.
A. 550 mph B. 605 mph C. 525 mph D. 435 mph
Mathematics
Find an equation of a parabola satisfying the given conditions.Focus at 
, directrix y = - 
A. x2 = 3y B. y2 = 3x C. y2 = 12x D. x2 = 12y
Mathematics
Find the radian measure of angle ?, if ? is a central angle in a circle of radius r, and ? cuts off an arc of length s. ? r = 5 inches, s = 25 inches ? ?= __________ radians
Fill in the blank(s) with the appropriate word(s).
Mathematics
Graph.f(x) = -3(x + 3)2 - 4
A. 
B. 
C. 
D. 
Mathematics