This is a sketch of y = sin x. The vertex A is at (270°, -1)
Write down the coordinates of the vertex A of the curve with equation
a) y = sin (x + 90°)
b) y = sin (-x)

Sue's average score for three bowling games was 162. in the second game, sue scored 10 less than in the first game. in the third game, she scored 13 less than in the second game. what was her score in the first game?