Find all the complex roots. Leave your answers in polar form with the argument in degrees.The complex cube roots of -8i
A. 512(cos 90° + i sin 90°), 512(cos 210° + i sin 210°), 512(cos 330° + i sin 330°)
B. 2(cos 90° + i sin 90°), 2(cos 210° + i sin 210°), 2(cos 330° + i sin 330°)
C. 2(cos 180° + i sin 180°), 2(cos 300° + i sin 300°), 2(cos 60° + i sin 60°)
D. 8(cos 90° + i sin 90°), 8(cos 210° + i sin 210°), 8(cos 330° + i sin 330°)
Answer: B
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Use identities to find the exact value of the expression.sin2 20° + cos2 20°
A. 0.04 B. 0 C. 1 D. 0.20
Find the domain and the range for the function.
A. D: 
, R: 
B. D: 
, R: 
C. D: 
, R: 
D. D: 
, R: 
For the complex fraction, determine the LCD of all the fractions appearing within the expression.
A. x(x + 5) B. x(x - 72) C. x + 5 D. x
Solve the triangle.b = 5, c = 10, A = 115°
A. a = 18.7, B = 19°, C = 46° B. a = 12.9, B = 21°, C = 44° C. a = 15.8, B = 23°, C = 42° D. no triangle