NDA Government Jobs Exams

What is the angle between the planes 2x – y – 2z + 1 = 0 and 3x – 4y + 5z – 3 = 0 ?

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NDA Other Question

What is the inclination of the line sqrt(3)x − y −1= 0 The roots of the equation
1 1 t 1
t 1 1 1
1 t 1 1
−
−
−
= 0 are