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4 waves $\;x_{1}=4 \sin5t\;, x_{2}= 8 \sin 5t\;, x_{3}=\cos 5t \;and\;x_{4}=4 \cos 5t \;$ interfere and if the final equation can be written in the form of $\;A \sin (5t+\sin^{-1}(\large\frac{B}{c}))\;$ , what is the sum of $\;A+B+C$ ?


1 Answer

Answer : (d) 26
The final wave is
$x_{1}+x_{2}+x_{3}+x_{4}=12 \sin 5t+ 5 \cos 5t$
$=13\;(\large\frac{12}{13} \sin 5t+ \large\frac{5}{13} \cos 5t)$
answered Mar 7, 2014 by yamini.v
edited Jan 11 by priyanka.c

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