Grafikdan sinusoidal funksiya amplitudasini topish

Quyida trigonometrik funksiya grafigi berilgan. U oʻrta chiziq bilan $\left(\dfrac{2}{3}\pi,1,2\right)$left parenthesis, start fraction, 2, divided by, 3, end fraction, pi, comma, 1, comma, 2, right parenthesis nuqtada kesishadi va uning minimal nuqtasi $\left(\dfrac{4}{3}\pi,-3,4\right)$left parenthesis, start fraction, 4, divided by, 3, end fraction, pi, comma, minus, 3, comma, 4, right parenthesis koordinatada yotadi.

Funksiya amplitudasi nechaga teng?

birlik