The graph of y=cos x° for -180

The graph of the function y = cos x is continuous and extends on either side in symmetrical wave form. (ii) Since the graph of y = cos x intersects the x-axis at the origin and at points where x is an odd multiple of 90°, hence cos x is zero at x = (2n + 1)π2 where n = 0, ±1, ±2, ±3, ±4

X= 2 he can buy 2 packs of cards for $12 and an action figure for $3 so he would spend $15 in total plus the free poster