Final answer:
(b = 2π(r + t/2) * a/360)
Step-by-step explanation:
The given expression, - (b = 2π(r + t/2) * a/360), appears to represent a mathematical relationship involving circles, angles, and sectors. The expression can be broken down to understand its components.
The term 2π(r + t/2) seems to denote the circumference of a circle, where 'r' stands for the radius, and 't' might relate to an angle or an arc, possibly divided by 2. The multiplication by a/360 suggests the involvement of an angle 'a' measured in degrees, indicating a fraction of the circle.
The negative sign at the beginning implies that this expression might be subtracted from something else or denotes a negative quantity in the given context. However, without specific details or context, it's challenging to provide a precise interpretation or perform calculations.
In summary, the expression likely pertains to circular geometry, potentially involving angles, arcs, and sectors. The understanding and computation of this equation would depend on additional information or context provided within a specific problem scenario.