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jordanrs
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Homework Statement
3.4 Consider the signal [tex]x(t) = sin^3(17\pi t)[/tex]
(a) Express this signal in terms of a sum of complex exponentials.
(b) Simplify this formula to the sum of sines and/or cosines.
(c) What is the fundamental period of x(t)?
(d) Sketch the spectrum for x(t).
(e) Sketch one period of x(t).
Homework Equations
D/K
The Attempt at a Solution
For part (a) i just switched out the sin part for eulers formulad [tex] x(t) = \left (\frac {e^{j17\pi t} - e^{-j17\pi t}}{2j} \right )^3 [/tex] but i don't think that's what is meant as its nota summation.
for (b) i imagine its going to use the double angle formulas but could find a succinct way to break up [tex]sin^3(x) [/tex]
for (c) would the fundamental period be would it just be [tex] P = \frac{17\pi}{2\pi} [/tex] making it just [tex]\frac{17}{2}[/tex]
then the final two steps i have no clue
any help would be most appreciated