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The plane passing through the line L: l x - y + 3(1 - l) z = 1, x + 2y - z = 2 and perpendicular to the plane 3x + 2y + z = 6 is 3x - 8y + 7z = 4. If q is the acute angle between the line L and the y-axis, then 415 cos2θ is equal to_____.

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Best answer

Correct answer is 125.

Normal of 3x – 8y + 7z = 4 will be perpendicular to the line

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