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A simple question from mathematics, send me the final answer quickly, please Find cos(6) if 9 is the angle between the vectors u=i+2j~2k and v=3j4k

A simple question from mathematics, send me the final answer quickly, please

Find cos(6) if 9 is the angle between the vectors u=i+2j~2k and v=3j4k 32-5-0 go Find the symmetric equations of the L that is parallel to the two planes 2m+2yz=2 and 23+6y+z=3, P(1, 2, 3) and that passes through the point

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