Which of the following signals are monotonic in nature?
A. 1-exp(-t)
B. 1-exp(sin(t))
C. log(tan(t))
D. cos(t)
Answer:A
Which of the following signals are monotonic in nature?
A. 1-exp(-t) B. 1-exp(sin(t)) C. log(tan(t)) D. cos(t)
Explanation: All of the other functions have a periodic element in them, which means the function attains the same value after a period of time, which should not occur for a monotonic function.