Find the angles in the triangle with vertices P ( 0 , 1 , 3 ) , Q ( 2 , 2 , 1 ) and R ( 2 , 2 , 4 ) Make vectors and use cos u v ( u x v )

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Find the angles in the triangle with vertices P ( 0 , - 1 , 3 ) , Q ( 2 , 2 , 1

Find the angles in the triangle with vertices P

(0, - 1, 3),

(2, 2, 1)

and R

(- 2, 2, 4) .

Make vectors and use cos

=

/ (|

|

|

|) .

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