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

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

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