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The greatest value of $\cos Î¸$ for which $\cos 5 Î¸ = 0$ is

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5+14

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Correct option is C

cosâ¡5Î¸=0â5Î¸=2nÏÂ±Ï/2 As cos Î¸ decreases in [0, Ï/2], it is greatest when Î¸ is least, i .e. Î¸=Ï/10=18âand cosâ¡Î¸=cosâ¡18â=5+58

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The greatest value of cos Î¸ for which cos 5Î¸ = 0 is

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The greatest value of $\cos Î¸$ for which $\cos 5 Î¸ = 0$ is