Find the angle between the vectors u = -6i+j and v= 51 +1 -3k. radians. The angle

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Find the angle between the vectors u = -6i+j and v= 51 +1 -3k. radians. The angle between the vectors is 0 (Round to the nearest hundredth.
Find the equation for the plane through the point Po=(5,2,8) and normal to the vector n = 9i + 8j + 2k. The equation for the plane through the point Po = (5,2,8) and normal to n = 91 +8j + 2k