Alocal department store had a saturday special. it offered an additional 25% discount on shirts that were already marked down 50%. how much did megan pay for a shirt that originally sold for $40?
a. $10

b. $15

c. $20

d. $30

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

b

step-by-step explanation: