Ithought of a number, divided it by 1 1 2 , then added 2 1 2 to the result, then multiplied the sum by 1 2 3 . then i subtracted 1 2 3 and got the result 2 5 6 . what was my number?

Step-by-step explanation:

Working backwards, the addition changes subtraction and division changes to multiplication and vice versa

The numbers are and

The result is  

Adding   to   we obtain

+ =

Dividing by we obtain

Subtracting from we obtain

Multiplying by we obtain

Therefore, the number is

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

false

step-by-step explanation:

rulers and compasses arent required in order to bisect an angle because when bisecting angles, you're making a "half circle" and considering in order to bisect an angle it wouldn't be straight, you wouldn't need either of the two