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JEE Main & Advanced Mathematics Trigonometric Identities Question Bank Numerical Value Type Questions - Trigonometric Functions

  • question_answer
    If the value of \[\cos \frac{\pi }{{{2}^{2}}}.\cos \frac{\pi }{{{2}^{3}}}\cdot .....\cdot \cos \frac{\pi }{{{2}^{10}}}.\sin \frac{\pi }{{{2}^{10}}}={{2}^{\frac{1}{k}}},\] then k is equal to

    Answer:

    9


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