Question: Using D'Alembert method 1 2 s i n x c o s t + 4 xtsinxcost + 2 xtsin ( x + t ) +

Using D'Alembert method
12sinxcost+4xtsinxcost+2xtsin(x+t)+x-tx+txdxutt=u,-
We get
a.12sinxcost+4xt.
b.sinxcost+2xt.
c.
sin(x+t)+x-tx+txdx
d. None.
 Using D'Alembert method 12sinxcost+4xtsinxcost+2xtsin(x+t)+x-tx+txdxutt=u,- We get a.12sinxcost+4xt. b.sinxcost+2xt. c. sin(x+t)+x-tx+txdx d.

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