railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Signals and Systems Laplace Transform
Which of the following represents the Laplace transform of sin(at)?
1
\(\frac{a}{{s + a}}\)
2
\(\frac{a}{{s - a}}\)
3
\(\frac{a}{{{s^2} + {a^2}}}\)
4
\(\frac{a}{{{s^2} - {a^2}}}\)