Question 847118
pi/3 is equal to 60 degrees.
sin (x^2) when x = pi/3 is sin((pi/3)^2) which is approximately .8897, but when x=60 degrees we get sin ((60 degree)^2)= sin(3600 degrees) = 0.  Why are the "answers" different?
-----------------
Degrees are not dimensionless, radians are.
1 radian = the angle subtended by an arc = to the radius --> r/r.
1 radian^2 is still a ratio with no dimensions.
-----
Using degs, squaring the angle --> "square degrees."
The sine of "square degs" is not = sine of degrees.