Campbell Ritchie wrote:Is she really supposed to evaluate sinθ²?
yes, it truly was sin(θ²). There were 5-6 problems, and a different one was to evaluate sin²θ
Campbell Ritchie wrote:Neither degrees nor radians have dimensions; does each even have a square at all?
does the number 2 have a dimension? I think not. but i know it has a square.
and my research shows that the square of a radian is a Steradian
, or square radian. It is used in 3-d geometry, referring to a solid angle of a sphere. It's sort of like the area where a cone starting at the center of a sphere intersects the surface of said sphere.