Solve the equation by finding an expression for the determinant on the left, and then solving using the appropriate method.
= -1
A. ?
B. {3}
C. {1}
D. {-1}
Answer: C
Mathematics
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A. d = 
; 
, 
, 
, 
B. d = 
; 
, 
, 
, 
C. d = 
; 
, 
, 
, 
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; 
, 
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, 
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Solve the equation for x if 
. Give your answer in radians using exact values only.
?
What will be an ideal response?
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