21) h(n)= 2n - 2; Find h(-8)

h(-8)=-18

Step-by-step explanation:

h(n)= 2n - 2

h(-8)= 2(-8) -2

h(-8)= -16-2

h(-8)=-18

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