The number of all possible 5-tuples (a(1...

The number of all possible 5-tuples `(a_(1),a_(2),a_(3),a_(4),a_(5))` such that ` a_(1)+a_(2) sin x+a_(3) cos x + a_(4) sin 2x +a_(5) cos 2 x =0` hold for all x is

A

zero

B

1

C

2

D

infinite

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The correct Answer is:

B

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