Multiply.(8i)(9i)
A. 17
B. 72
C. -17
D. -72
Answer: D
Mathematics
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Replace the Cartesian equation with an equivalent polar equation.x2 - y2 = 4
A. cos2? - sin2? = 4r B. r2 cos 2? = 4 C. r cos 2? = 4 D. cos2? - sin2? = 4
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Find 
.y = 3 sin-1 (5x4)
A. 
B. 
C. 
D. 
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Name the quadrant in which the angle ? lies.sec ? < 0, tan ? < 0
A. I B. II C. III D. IV
Mathematics
Plot the complex number in the complex plane.z = 4i
A. 
B. 
C. 
D. 
Mathematics