Consider a= sin -1 (-3/4) and ß be angle whose terminal side passes through given point (-2,-3).
i) Determine sina, cosa, sinß, and cosß.
ii) Determine sin(a-ß), cos(a-ß), cos(2a), and sin(2ß).
iii) Determine sin (a/2). [Note that a/2 is in Quadrant IV).