Trigonometry - The graphs of sin and cos

[emersonbrazilfrancisco]

I like how he discuss it clearly, how he draw and explain it clean which makes me understand easily

[squidman]

Thank you so much. This helped me a lot with my pre-calc test. :)

[abdoennajah]

Thanks man and great explanation, finally i understand why trigonometric functions have these shapes ❤

[swapnilpatil]

Thank you so much, I'm struggling to understand it from 2days and now I understand it better👍
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[maggieandrews]

Thank you so much this explanation helped a ton. It just clicked

[iceyygamez]

This helped me out a ton!! thank you so much!!

[akeibazli]

My good sir...you had helped me alot...but i recommend you to give some example question in your other videos in the near future, thank you

[veonl]

Thks for the great explanations! I found cos [(5*pi)/2] = to -3.49 + e ^(-11), which is very close to wonder why it's not exactly zero

[straightforward]

Thank you very much sir... I understood the graph concept of sine and cosine properly. The use of circle radian value system help a lot in my case....Love from India....

[pinheadlarry]

How would I know the difference between the sine and cosine graphs after they have been shifted? Sometimes a shifted cosine graph can look just like a regular sine graph so is there any way I can tell the difference when comparing? Some of my HW questions asked me to create the equation from scratch by looking at a pre-made graph and I was worrying for some of them because I couldn't tell if it was just a regular sine graph or a shifted cosine graph. plz help

[saadsrequiemforsasuke]

Thank you! have explained it well and clearly how to draw the sin and cos graphs in trigonometry but in what case would the sin or cos graph start as negative..??!! The answer is needed asap because I have exam!!

[shore]

Really helpful thanks a lot.
So if we compare sine with cosine
0 to 45 cosine is bigger
And 45 to 90 sine is bigger

If we compare their value.

[cherryannconsar]

I still cant understand where that values and curve came from

[safsaf]

thank you a looot it's really helpfull

[just]

If you divide a quadrant of a circle in 4 equal parts that would mean that each part is 22, 5 degrees (90÷4). You make it seem like the sine of 22, 5 degrees is 0, 5 instead the sine of 30 degrees is 0, 5. Or am I misinterpreting your drawing?

[anshgaina]

Don't know why people are stuck at degrees... Btw nice explanation.... Thanks a lot..

[scottslatter]

Why does he use Pi instead of degrees?

[dice]

Why do we have to use π instead of 1234~ counting numbers ?

[tomvanzanten]

Why has the cosine function been moved over, resulting in it never crossing X=0?

[anshukchaturvedi]

I still couldn't get why cos graph is started like that . And how Cos is X coordinate on Unit circle