Without graphing the function, determine its amplitude or period as requested.y = 
cos 
Find the period.
A. 
B. 
C. 
D. 
Answer: A
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Graph the pair of polar equations on a calculator, together on the same screen, and use the trace feature to estimate the polar coordinates of all points of intersection of the curves. Round to the nearest hundredth, if necessary.r = 7, r = 4 + 3 sin ?
A. (1.57, 7) B. (7, 1.57), (7, 4.712) C. (7, 3.14) D. (7, 1.57)
Write out the first three terms and the last term of the arithmetic sequence.
A. -1 - 3 - 6 - . . . - 300 B. -3 - 6 - 9 - . . . - 300 C. -3 + 9 - 27 + . . . - 900 D. -3 - 9 - 27 - . . . - 900
Sketch the graph of the equation.x = 4
A. 
B. 
C. 
D. 
Find all complex roots. Write the answer in polar form, with 0 ? ? ? 360°.Fifth roots of i
A. cos 90° + i sin 90°, cos 18° + i sin 18°, cos 162° + i sin 162°, cos 234° + i sin 234°, cos 306° + i sin 306° B. cos 0° + i sin 0°, cos 36° + i sin 36°, cos 108° + i sin 108°, cos 252° + i sin 252°, cos 324° + i sin 324° C. cos 90° + i sin 90°, cos 72° + i sin 72°, cos 144° + i sin 144°, cos 216° + i sin 216°, cos 288° + i sin 288° D. cos 270° + i sin 270°, cos 36° + i sin 36°, cos 108° + i sin 108°, cos 252° + i sin 252°, cos 324° + i sin 324°