A counseling service records the number of calls to their hotline for the last year. What is the forecast for March if an adjusted exponential smoothing model is used with a =0.8 and b=0.7? The unadjusted forecast for January is 123.5.

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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

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.

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step-by-step explanation: