Introduction to Inverse Sine, Inverse Cosine, and Inverse Tangent

[@otamanlvhs]

When I sit in class I feel so dumb because I don't understand what my teacher is explaining but every time I turn on your videos math instantly becomes so clear that I'm starting to enjoy doing math.Thank you for devoting your time.

[@MusabXD3000]

Crazy how these videos are helping me out after 12 years!

[@mostjuanerable584]

I think it's because our minds can only focus for so long so you inevitably miss things, which is why TED talks for example they go over the same concept multiple times to make sure the whole audience gets it. In math they use a lot of mathy language that's hard to understand as a newcomer which makes it especially hard to follow. So having these videos is really the only way I've been able to learn precal so far

[@NachWolf]

This has really helped me. It is the day before my test and I was freaking out because I didnt feel ready. I feel more comfortable now. Thank you

[@jav9921]

wow, I spent all day looking for a way to check with a calculator, thanks, you're a life saver.

[@ian.ambrose]

Thank you, Professor.

[@tymgrebenyuk8901]

5:40 - why is that in quadrant 4 and not 3?

[@Mathispower4u]

This is because the output of inverse tangent is from -pi/2 to pi/2, which would be in quad 1 or 4. Also notice in Q2 x and y are negative so the tangent function value would be positive.

[@TheTwivi]

It's great!!!! clear presentation, much better than my professor Very helpful ;)

[@abeerraad955]

@8.45 you said that the Tan=opp/hypo agree??

[@muatazhasan8508]

Good job. And interesting quote

[@ruggjess]

Hi! Great video and explanations!! I've learned more here than others. Question though. In your example 1, shouldn't the quadrant -pi 3/2 be in quadrant IV not II ? You mention quadrant 2 and so I just want to be sure. thanks for all your help!!

[@saramchugh-grant6490]

Very helpful, thank you!

[@rosschavelas8936]

So helpful thanks for sharing!!!!

[@lousyindian]

Thank you Guru

[@ronamtic]

xcellent video. thx

[@basilfriends8314]

balls

[@zackthewack56]

Hi, I am very confused as when I type in arctan(5/15) in my calculator (Same TI-84 Plus C Silver Edition calculator as you use on screen), instead of getting 18.43 I get 0.4899573263.

[@Mathispower4u]

It looks like you are in radian mode,,rather than degree mode.

[@zackthewack56]

@@Mathispower4u Thank you so much, I really appreciate all your videos!