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

[@deyastoilova3957]

THANK YOU THANK YOU THANK YOU!!!!! 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! ❤️❤️❤️

[@xxwolfpackxx4337]

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

[@DLRox1234]

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

[@theokelesis6645]

Another great video, keep up the good work Joel!

[@poonminchang6165]

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.

[@madisondriver3297]

Thank you, thank you, thank you!

[@sameso8656]

Great video; very well explained. Love the accent btw

[@JoelSperanzaMath]

Thanks mate, I forget sometimes that people don't talk like this!

[@sosomarroqi9443]

That was so easy to understand thank you!

[@dracowyerc.v.2391]

very clear; Thanks;

[@ashleylovebear]

Very helpful, thanks so much :)

[@yaseenrahman6547]

this was so helpful thanks

[@caillouoosthuizen7084]

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

[@andrewfleet2113]

thankyou

[@syedmdabid7191]

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

[@trentontong2859]

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

[@MoxinMusic]

I like your accent and content.

[@haileywilson6596]

Wow thank you so much!!(:

[@maryamalkholi5278]

thank you

[@ashwinbarnwal1281]

👏

[@tombradysson8651]

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

[@JoelSperanzaMath]

Sorry it didn't work out for you mate. But I can assure you, a sin curve is not a straight line. Either Mathway is broken, or there's a problem between your keyboard and your chair. :)

[@cjtyrone6942]

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

[@JoelSperanzaMath]

I'm really happy it helped. Come back to this comment and let me know if there's anything else you're having a problem with.

[@GhaliumHD]

i love you

[@nelisokhumalo9941]

Wow

[@iliveinacrowdedhouse368]

Were u in a jungle?

[@JoelSperanzaMath]

Unfortunately I've got to make my videos where and when I can. This one was outside my staffroom and the crows were feeling really rowdy that day!

[@ellewoods3321]

@@JoelSperanzaMath it sounds cool actually

[@jakepocock5883]

Great vid. But the audio is trash lol.

[@Danymok]

Yeah. Good content. Helpful. Bad quality audio.