Question

What is the amplitude of `f(x) = -3cos(x/2 + pi)`?

Answer 1

amplitude = 3

Explanation:

the standard form of a trig waveform is

`y = acos(bx + c )`

where a = amplitude , period`= (2pi)/b and c = color(black)(" shift ")`

here |a| = 3 , hence a = 3
graph{-3cos(x/2+pi) [-10, 10, -5, 5]}