Inverse Trigonometric Functions

[williamk766]

someone help me understand why the sin and tangent is never in quadrant 4. TT.TT

[SheroClan]

@williamk766 unit circle my bro. unit circle.

[LazyLionStudio]

so how would you figure out Cot(arccos(-3/5))????

[krispyzzz]

THANK YOU!!!! OMG !

[rsgirl10]

Your voice reminds me of Todd from the Fox and the Hound.

Awesome video.

[MissKyasurin]

This will be really useful for my friends who haven't taken trig and were placed into pre-cal. Our pre-cal teacher sucks and I feel bad for the kids who didn't get a great trig teacher like I did. I know all this stuff and my teacher is just confusing everyone lol. I'll most likely show this to my peers and hopefully it will be more useful than my stupid teacher. Thanks!

[isuruar23]

how do you get pie over 3 in the first example??

[matt62591]

Where does the square root of 15 come from??

[LaLaLandxo43]

@matt62591 he used pythagorean theorem 1+x^2=16 => x^2=15 => x=sqt15

[TheWillSummer]

great video! thanks.

[1jthandi]

This was extremely helpful, thank you soo much

[EarlWSharp]

"So everything's still cool"

Best reassurance ever.

[nicholasadams26]

At the end of the video.where did u get the square root of 15 from.how did u get it

[bouler22]

thanks!



[basslinet]

Thanks :)

[utboy92]

god bless you

[utboy92]

thank you. seriously , thank you.

[utboy92]

thank you. seriously , thank you.

[kellykedavra]

for the examples I don't get how you got the answers.. you seem to just tell us the answer and move on without any explanation! :(

[waszel]

@kellykedavra If you are referring to the examples similar to say finding the arccos(1/2) to get pi/3, then it is expected that you are already familiar with the unit circle and the fact that cos(pi/3)=1/2. Otherwise, yes, it looks like the numbers just magically appear without any explanation. See my videos "Trigonometric Function Values of Special Angles" and "Reference Angles".

[lmafo4utube]

You saved my life sir

[duke3003]

Wow great video! This helped me out a lot!

[zx6rtt]

HOLY CRAP, do you realize how much TIME i spent trying to figure this one out ???

I kept thinking that the angle (Arccos(1/4)) HAD to be found in order to determine the value of Sin at that angle. But it turns out that you never actually find out the value of the angle (Arccos(1/4)) just the VALUE of Sin at that same angle.

Thanks for the epiphany moment

xD

[Baby499]

THANK YOU SOO MUCH

[EvaSlash]

it is because of you I got an A in the beginning of my college pre cal class,I cannot understand anyone else on this internet or in school, you are my savior. I wish you also taught economics because I am doing so bad in it right now!!

[baraa712]

This was a really helpful YouTube video, Thanks man.

[TheHoboFrog]

thank you sir, i have my final for trig coming up and this made inverse trig functions very clear!

[miksufication]

this is awesome. thank you so much!

[jillianjigs11]

You. Are. My. Hero

[wormypainter]

I'm pretty sure this just saved my life..... thank you... so much. I thought I was going to go completely insane before I could figure this out.... my professor did NOT do a good job explaining this.... I might actually be able to get this stuff right.... THANK YOU!

[swttfam3]

Thank you so much for this video!

You are an awesome teacher that really knows how to get the point across.

Now I can do my homework with confidence!!!

:D

[sonalshawn]

thanks alot.... i wish my teacher explained it this way

[Ajmasterb12]

Wonder how many times he says "Between negative pie over two and pie over two!"

[cardman5]

thank you!!!!!!!

[felixduhcat89]

Ah, this really helps a lot. You are an excellent teacher.