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If f(x)=(ax + b)sinx+(cx +d)cos x, then ...

If `f(x)=(ax + b)sinx+(cx +d)cos x`, then the values of a b, c and d such that `f"(x)=xcos x` for all x, then (a + b + c + d)is

A

b=c=0, a=d==1

B

b=d=0, a=c=1

C

c=d=0, a=b=1

D

None of these

Text Solution

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The correct Answer is:
A
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