Question

can someone help me write a program for MATLAB for cos(theta)

SO FAR I HAVE:

clc
clear
theta=0:pi:4*pi;
plot(theta,cos(theta))
xlabel('theta')
ylabel('cos(theta)')
grid off

for some reason it's display the graph not 'curve' and it's not display the x values a 0,pi,2pi,3pi,4pi...

someone help please :/

Answer 1

for some reason it's display the graph not 'curve' and it's not display the x values a 0,pi,2pi,3pi,4pi...

^ what do you mean?

Answer 2

give me a sec and I'll upload the problem exactly.. it has a picture..

Answer 3

Write a MATLAB program that generates the following plot:(Note: you also need to label the x and y axis)

Answer 4

so far.. i have :

clc
clear
theta=0:pi:4*pi;
plot(theta,cos(theta))
xlabel('theta')
ylabel('cos(theta)')
grid off



but it still doesn't look like the plot it gives and i don't know what else to do

Answer 5

I will try it on my machine

Answer 6

okay, thank you!

Answer 7

I see your problems , you needs more values for theta than just 4 values

Answer 8

how do it do that?

Answer 9

Try that

Answer 10

clc
clear
x = 0:pi/1000:4*pi

plot(x,cos(x))
xlabel('theta')
ylabel('cos(theta)')
grid off

Answer 11

it's perfect other then the x values don't appear the same as in the picture i uploaded.. you see that?

Answer 12

yeah, that's what I am looking at too

Answer 13

try the following

Answer 14

clc
clear
x = 0:pi/1000:4*pi
theta=0:pi:4*pi

plot(x,cos(x))
set(gca,'XTick',0:pi:4*pi)
set(gca,'XTickLabel',{'0','pi','2 pi','3 pi',' 4 pi'})
xlabel('theta')
ylabel('cos(theta)')
grid off

Answer 15

it's perfect!!! thank you!

my goodness you're amazing!

Answer 16

welcome