Perform the matrix operation.Given A =  and B =  , find BA.

A.
 
B.
 
C.
 
D.
 


Answer: B

Mathematics

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Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cot ? = -3, sec ? > 0Find cos .

A.
B. -  
C.  
D. -  

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