Use trigonometric identities to find the exact value.
A. - 
B. - 
C. - 
D. -2
Answer: B
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Find all real roots of the given equation by using Newton's method.2x3 - 3x2 - 7x + 1 = 0
A. 2.7194257, 0.1356811, -1.3551068 B. 2.7194257 C. 2.7194227, 0.1356791, -1.3551088 D. 2.7194227, -1.3551088
Evaluate.cos (cos-1 0.4)
A. 0.9 B. 2.7 C. 3.5 D. 0.4
Find the indicated term of the geometric sequence.a5 when a1 = 9 and r = 3.
A. 81 B. 729 C. 108 D. 2187
Complete the square to write the equation in the form 
+ 
= 1 or 
+ 
= 1.Determine the center, foci, and vertices of the ellipse.25x2 + y2 - 200x + 375 = 0
A. 
+ (y - 4)2 = 1
center: (4, 0); foci: (4, 2
), (4, -2
); vertices:(4, 5), (4, -5)
B. (x - 5)2 + 
= 1
center: (5, 0); foci: (5, 
), (5, -
); vertices:(5, 4), (5, -4)
C. 
+ (y - 5)2 = 1
center: (5, 0); foci: (5, 
), (5, -2
); vertices:(5, 4),
(5, -4)
D. (x - 4)2 + 
= 1
center: (4, 0); foci: (4, 2
), (4, -2
); vertices:(4, 5), (4, -5)