What is the greatest common factor. 9a^7t^2 and 12t^2

what is the greatest common factor. 9a^7t^2 and 12t^2

9·a^7·t^2 = 3·t^2·(3·a^7)

12·t^2 = 3·t^2·(4)

So the greatest common factor is 3·t^2

hope it you

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