How to integrate cosine wave in MATLAB?

I have a cosine wave of 50Hz and and 1000 Amplitude. It is a AC voltage. I need to integrate it. I know that it would be the sine wave but i don't how to makethat. I have written the cosine wave part which is given below:

clc

clear

f=50;

a=1000;

dt=0:1e-6:40e-3;

V1=a*cos(2*pi*f*dt);

plot(V1)

How can I do the integration after that?

Answer 1

[Star Strider]

One way to ingegrate the ‘V1’ vector is to use cumtrapz —

f=50;
a=1000;
dt=0:1e-6:40e-3;
V1=a*cos(2*pi*f*dt);

figure
plot(dt,V1)

V1i = cumtrapz(dt,V1);

figure
plot(dt,V1i)

.