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Angle Between Two Surfaces

Calculate the acute angle between 2x - 4y - z = -5 and 3x + 4y + 5z = -6

Problem
Calculate the acute angle between two intersecting surfaces whose equations are as follows:
$$2x - 4y - z = -5$$

$$3x + 4y + 5z = -6$$

A.   62.4° C.   42.6°
B.   64.2° D.   46.2°

 

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