The rocks near the shore between two lighthouses at point a and b make the waters unsafe. the measure of axb is 300. waters inside this arc are unsafe. suppose you are a navigator on a ship at sea. how can you use the lighthouses to keep the ship in safe waters?

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

the answer is 1/4

step-by-step explanation: