Acertain oxyacid is derived from the oxyanion so3(-2). the formula for the oxyacid is which

To make this anion into a complete acid, then this must be added with Hydrogen ion H+. So the chemical equation looks like:

H+  +  SO3(2-)  -->  ?

Now to balance it:

H+  +  SO3(2-)  -->  H2SO3

H2SO3

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

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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