1. Question 301
    Trigonometry - Trig. Equations - Inverse Trig. Functions
  2. Question 1035
    was: Trigonometry - Trig Functions - Arcsin,arccos,arctan
    now: Trigonometry - Trig Functions - arcsin(ax), arccos(ax), arctan(ax)
  3. Question 1728
    was: Differentiation - Inverse trig functions - Arcsin and arccos 2
    now: Differentiation - Inverse trig functions - Derivatives of arcsin, arccos, arctan