Ineed the answers for 11-13 and you is you can only do one of them that’s okay with me

Step-by-step explanation:

11. I can't see the full problem statement, so I'm unable to answer the question.

12. Answer below:

"one half" =

"negative five eighths" =

To evaluate the expression, you multiply the two numbers together:

13. Answer below:

"one third" =

"eleven sixteenths" =

To evaluate the expression, you multiply the two numbers together

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