Question: (a) Using the gradient concept, prove that the angle between two planes is (b) Calculate the angle between two planes x + 2y + 3z

(a) Using the gradient concept, prove that the angle between two planes

ax + by + cz = d ax + By + y2

is

= 8

(b) Calculate the angle between two planes x + 2y + 3z = 5 and x + y = 0.

ax + by + cz = d ax + By + y2 = 8

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