1.

The area bounded by the curves `y=f(x),`the x-axis, and the ordinates `x=1a n dx=b`is `(b-1)sin(3b+4)dot`Then `f(x)`is.`(x-1)cos(3x+4)``sin(3x+4)``sin(3x+4)+3(x-1)cos(3x+4)`None of theseA. `(x-1).cos(3x+4)`B. `sin(3x+4)`C. `sin (3x+4)+3(x-1).cos(3x+4)`D. none of these

Answer» Correct Answer - C


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