Solve the trigonometric equation symbolically, graphically, or numerically for 
2 sin2 ? - 1 = 0
A. ? = 45°, 135°, 225°, 315°
B. ? = 60°, 120°, 240°, 300°
C. ? = 45°, 135°
D. ? = 60°, 120°
Answer: A
Mathematics
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Answer the following statement true (T) or false (F)
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Solve.Two points, A and B, are on opposite sides of a building. A surveyor chooses a third point, C, 69 yd from B and 91 yd from A, with angle ACB measuring 51.1°. How far apart are A and B (to the nearest yard)?
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Find the limit.
A. -? B. 0 C. ? D. Does not exist
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Graph the ellipse and locate the foci.
+ 
= 1
A. foci at (2
, 0) and (-2
, 0)
B. foci at (2
, 0) and (-2
, 0)
C. foci at (0, 2
) and (0, -2
)
D. foci at (
, 0) and (-
, 0)
Mathematics