Choose the appropriate sketch and description for the indicated geometric object.Right ?ABC
A. 
, 
, 
have different lengths; ?B = 90°
B. 
, 
, 
are the same length
C. 
, 
, 
have different lengths
D. 
, 
are the same length
Answer: A
Mathematics
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The eccentricity is given of a conic section with one focus at the origin, along with the directrix corresponding to that focus. Find a polar equation for the conic section. e = 5, x = -9
A. r = 
B. r = 
C. r = 
D. r = 
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Identify the polynomial as a monomial, binomial, trinomial, or none of these.-19z - 2
A. None of these B. Trinomial C. Monomial D. Binomial
Mathematics
Perform the indicated operation. If possible, simplify.Factor:2 cos x + 8 cos2 x
A. 2
B. cos x
C. 2 cos x
D. 2cos x
Mathematics
Find det A using the method of cofactors.A = 
A. -24 B. -124 C. 24 D. 324
Mathematics