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The number of different AP's whose f...

The number of different AP's whose first three terms are `cos θ , (cos 2 θ)/ 2 , cos 3 θ` is/are Question Type: single correct Type [ 1 . ) 0 ] , [ 2 . ) 1 ] , [ 3 . ) 2 ] , [ 4 . ) 3]

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