Existing driveways of asphalt or concrete can be overlaid with asphalt with excellent results. Usually for driveways, a surface course 1.5 to 2 inches thick will suffice. Before paving, be sure the contractor patches any serious holes or cracks with asphalt and compacts it.Otherwise the trouble spots may reflect upwards through your new pavement.sually for driveways, a surface course 1.5 to 2 inches thick will suffice. Before paving, be sure the contractor patches any serious holes or cracks with asphalt and compacts it. Otherwise the trouble spots may reflect upwards through your new pavement.
The radian is the standard unit of angular measure, used in many areas of mathematics. An angle 's measurement in radians is numerically equal to the length of a corresponding arc of a unit circle; one radian is just under 57.3 degrees (when the arc length is equal to the radius).he concept of radian measure, as opposed to the degree of an angle, is normally credited to Roger Cotes in 1714. He described the radian in everything but name, and he recognized its naturalness as a unit of angular measure.
It's not that mathematicians just like pi. Radians are actually a more natural choice of angle measure than degrees, for the above reasons. They are the angle measure in which factors like pi/180 disappear. So IMO, the question is not why use radians, but why not use radians.In other words, one doesn't need a reason to use radians; they are the default choice of angle measure. One needs a reason to use degrees.For example one might choose to show angles in degrees in the user interface of an app, because they're more familiar to many people (especially artists).n other words, one doesn't need a reason to use radians; they are the default choice of angle measure. One needs a reason to use degrees. For example one might choose to show angles in degrees in the user interface of an app, because they're more familiar to many people (especially artists).