Identify two pairs of consecutive interior angles.
A. 4 and 7; 10 and 13
B. 4 and 16; 6 and 10
C. 5 and 9; 6 and 7
D. 7 and 12; 6 and 9

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step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2