How do you graph $y=-4cos2x$ ?

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Answer 1 · 2018-07-26T12:40:26

See graph and details.

$Cosine wave: y = - 4 cos 2 x in [ - 4, 4 ]$

Amplitude = 4..

Period $= ( 2 pi )/2 = pi$

Graph, showing range and one period:
graph{(y+4 cos (2x))(x-pi/2 +0y)(x+pi/2+0y)(y^2-16)=0}.

How do you graph y=-4cos2x y=-4cos2x?