Solve.A rotating beacon is located a distance d from a long wall. The distance d is given by 
, where t is the time measured in seconds since the beacon started rotating. Solve the equation for t.
A. t = 
arctan 
B. t = 2? arctan 
C. t = 2? tan 
D. t = 
tan 
Answer: A
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Find the Maclaurin series for the given function.cos 5x
A. 
B. 
C. 
D. 
Use logic to solve the problem.During vacation time, two students met on a train. One asked the other how old he was. He replied, "The day before yesterday I was 15, and next year I will have my 18th birthday." On what date of the year did the two students meet?
A. Feb 29 B. Dec 31 C. Jan 1 D. Feb 28
For the curve r(t), find an equation for the indicated plane at the given value of t.r(t) = (t - 4)i + (ln(sec t) - 1)j + 4k, -?/2 < t < ?/2; normal plane at t = 6?.
A. x = 4 - 6? B. x = 6? + 4 C. x = -6? - 4 D. x = 6? - 4
A light truck with manual transmission has a circular brake drum with a diameter of 323 millimeters. Each brake pad, which presses against the drum, is 308 millimeters long. What central angle is subtended by one of the brake pads? Write your answer in both radians and in degrees. If the answer needs rounding round it to three significant digits.
?
?
?a = 308 millimeters, b = 323 millimeters
?
__________ radians
?
__________ degrees
What will be an ideal response?