4.6 Graphs of csc, sec, tan,cot 

wow this helped a lot. My teacher is no where near as understanding as you are. You deserve more views! This helped alot.

BEST SIN , COS CLASS EVER I FOUND IN U TUBE....

Very beautifully explained

bro just scrolled thru this vid. I took pre calc last year as a freshman. The teacher could not teach and I am know just fully understanding this completely. I had sort of a vague representation of it, this was my worst unit ever. Im thankful for watching this vid because calc is gonna be oc hard.

This is how teaching should be done; everything is done with a reason. It is all about understanding - not this thing of always following the book.

wonderful lecture!

Super I really like this lecture and thanks

This helped me ALOT! thank you for your video!!!!!

Very interesting now I knows my math

you are better than my teacher

thanks. this helped a lot

Omg your soo good!

thank you so much

Now it's time for English!

You can’t teach!!!!! Mumbling to yourself that only confuses kids!!!