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JEE Main & Advanced Sample Paper JEE Main - Mock Test - 1

  • question_answer
    The plane \[2x-2y+z=3\] is rotated about the line where it cuts the xy plane by an acute angle \[\alpha \]. If the new position of plane contains the point (3, 1, 1), then \[\cos \alpha \] equal to _______.

    Answer:

    0.77


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