On a unit circle, the terminal point of O is (1/2,V3/2). What is O? A. Pi/3 radians
B. Pi/6 radians
C. Pi/2 radians
D. Pi/4 radians

true? is that what you're asking or do you mean something else?

by definition, an arc subtended by a central angle of some given measure has the same measure. so .

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116