1. Ifm AB = 7, what is m DC? 2. If measure angle A is 70, what is measure angle B?
3. If measure angle B = 2x - 6 and measure angle A is 82, what is x?
4. If measure BC = 12, what is measure AD?

HELPPP​

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step-by-step explanation:

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