Multiply the hours of labor by $55, then add $80. if c = cost in dollars and h = hours of labor, which equation expresses the rule above? a. c(h) = 80h 55 b. c(h) = 55(h 80) c. c(h) = 55h 80 d. c(h) = 80(h 55)

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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

step-by-step explanation: