[" 17.The equation "k cos x-.3sin x=k+1"...

[" 17.The equation "k cos x-.3sin x=k+1" is solvable only "],[" if "k" belongs to the interval "],[[" (a) "[4,oo)," (b) "[-4,4]],[" (c) "(-oo,4]," (d) None of these "]]

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