Write the number in trigonometric form. Let 0° ? ? < 360°.1 - i
A. 
(cos 225° + i sin 225°)
B. 
(cos 45° + i sin 45°)
C. 2(cos 315° + i sin 315°)
D. 
(cos 315° + i sin 315°)
Answer: D
Mathematics
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Solve the logarithmic equation.log4(x + 9) + log4(x - 9) = 3
A. 
B. 
C. 
D. 145
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What is PO in dBm when PO = 4.2 W.
a. 1.7 dBm b. 3.6 dBm c. 4.2 dBm d. 20.9 dBm e. 36.2 dBm
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Estimate by rounding as directed.532.432 - 25.9; nearest tenth
A. 506.7 B. 506.5 C. 496.5 D. 506.6
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The rectangular coordinates of a point are given. Find polar coordinates for the point.(-2, 0.6) Round the polar coordinates to two decimal places, with ? in radians.
A. (-2.09, 1.28) B. (2.09, -1.28) C. (2.09, 1.28) D. (2.09, 2.85)
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