In this question, it is a useful aid to draw a unit circle to represent the given information, and the results you obtain. Suppose that we know for an angle @ in radians, sin 0 = -0.8. If we know that 0 is between and NA the value of @ to 3 significant figures is Suppose that for another angle a, also in radians, we have sin a = -0.8 and we know that a is between x and 2 To 3 significant figures, the value of a is