Finding the equation of a periodic function from a graph or sketch

[deyastoilova]

THANK YOU THANK YOU THANK I’m so happy I found you because you taught me in 8 minutes what my Honors Trig/Pre-Calc teacher couldn’t teach me in 50 minutes, so a huge THANK YOU! ❤️❤️❤️

[poonminchang]

Hi, l just found your website. Can you please explain why the c value for cosine is - 1 and for the sine, it is +2. Thank you so much.

[DLRox]

Very informative and easy to understand, thank you! :)

[xxwolfpackxx]

The very first time I got correct to solve the problem after watching your video.

[theokelesis]

Another great video, keep up the good work Joel!

[syedmdabid]

So whats the period of:- - y= a sin x+ b cos x ???

[trentontong]

Is there an algebraic way to find the value of c?

[caillouoosthuizen]

the b formula does not work what if graph starts at -90 and ends at 270 max value is 1 and min is -3 is a negitive cos grapgh

[sosomarroqi]

That was so easy to understand thank you!

[DazedDreamer]

Great video; very well explained. Love the accent btw

[tombradysson]

If you enter your equation into Mathway it’s wrong idk what to say but it’s just a straight line I failed my math test with this formula

[cjtyrone]

Dude... I’m in college and not even my assigned teacher taught it this well.

[jakepocock]

Great vid. But the audio is trash lol.