- #1
Sparky_
- 227
- 5
Homework Statement
Find when this is "0" for the first time:
[tex] q(t) = e^{-20t} (5cos(40t) + \frac{5} {2} sin(40t)) [/tex]
Homework Equations
The Attempt at a Solution
[tex] 0 = e^{-20t} (5cos(40t) + \frac{5} {2}sin(40t)) [/tex]
[tex] 0 = (5cos(40t) + \frac{5} {2}sin(40t)) [/tex]
[tex] cos(40t) = -\frac{1} {2}sin(40t)) [/tex]
Is the best way to solve this perform interations?
Thanks
Sparky
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