Does anyone know what to do on this by chance?

try this

Step-by-step explanation:

90/450=160/vt

so 90 multiplies vt and 450 multiplies 160 as a cross multiplication

and jus slove it ull get ur ans

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