The measure of 1 =
40
80
160

∠ 1 = 40°

Step-by-step explanation:

The sum of the angles making up the circumference = 360°

measure of lower arc = 360° - (150 + 130)° = 360° - 280° = 80°

∠ 1 is half the measure of the intercepted arc, that is

∠ 1 = 0.5 × 80° = 40°

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

multiple all that

step-by-step explanation:

27×17