Trigonometry fundamentals | Ep. 2 Lockdown live math

Comments · 1.4K

• GE

  @geoc2140 · 6 years ago (edited) · pinned

  Start of Lecture &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs">0:00</a> (Fixed to trimmed video) <br>Q1 Graph of (cos θ)² &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=134">2:14</a> <br>Q2 Translations of cos θ to (cos θ)² &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=334">5:34</a> <br>Q3 f(2x) = f(x)² &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=654">10:54</a> <br>Intro to Trig &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=794">13:14</a> <br>Q4 sin(3) &amp; cos(3) &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1004">16:44</a> <br>SohCahToa - <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1244">20:44</a> <br>Q5 Leaning Tower &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1349">22:29</a> <br>How to Compute Trig Functions? &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1859">30:59</a> <br>Q6 sin(π/6) &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2014">33:34</a> <br>Q7 cos(π/6) &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2179">36:19</a> <br>Q8 Trig of -θ &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2614">43:34</a> <br>Computing Trig Functions &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2864">47:44</a> <br>Q9 cos(π/12) &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2994">0:49:54</a> <br>Adv Trig Functions &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3404">0:56:44</a> <br>Q10 Graph of tan(θ) &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3630">1:00:30</a> <br>JSON comment &nbsp;- <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3744">1:02:24</a><br> <br>“The most exciting part of the lecture” – Grant <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3934">1:05:34</a>

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• GO

  @goofyrice · 6 years ago (edited)

  When people were voting on 4 options, the most voted bar should have been brown, so there were 3 blue and 1 brown bars.

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• AA

  @AalapShah12297 · 6 years ago

  It&apos;s amazing how this livestream has better editing than so many non-live videos. Live quizzes, Q&amp;A, seamless switching between so many screens - all after already delivering top notch content.

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• AR

  @artvandalay5804 · 6 years ago (edited)

  3b1b: makes a video on high school math topic<br><br>Comment section: <b>grown adults with full time jobs</b>

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• RI

  @ri-lj5ev · 6 years ago

  This man is literally the Bob Ross of math 🤣

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• XR

  @xristiano_talimpan · 6 years ago

  Youtube&apos;s new feauture allows for timestams to be shown in the video progress bar, so a nice idea would be to add timestamps in the description so we wouldn&apos;t have to scroll.

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• AN

  @anteconfig5391 · 6 years ago (edited)

  I&apos;ve only watched 38 min so far and I&apos;m already thinking that this is exactly how we should be teaching students. Live or not, in class or online. You sir, are a good teacher. You should be like a consultant for some school board of education or something. What the world needs is more teachers who can teach like you.

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• NA

  @NathanaelKuechenberg · 6 years ago

  Compare this with my University lectures and there is no comparison. We need to have this type of fun in the University and have the time to ponder and think instead of rushing at the speed of light and cramming for a test.

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• JL

  @jlpsinde · 6 years ago

  Incredible, thank you very much.<br>I&apos;m a physics teacher, 45, and since 1990 I&apos;ve never seen such an interesting and imaginative talk about trigonometry!

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• CA

  @capilover1023 · 6 years ago

  Grant: ok so there&apos;re 4 possible answers for the question so choose wis...<br><br>People who broke down the poll: <b>REALITY CAN BE WHATEVER I WANT</b>

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• YB

  @ybc8495 · 6 years ago

  my 8 year old son is your fan, I suspicious whether he really understands, but seems he get the most multiple choice correct.

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• P0

  @p0kenon · 6 years ago (edited)

  Start (he appears on camera) <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=554">9:14</a><br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=736">12:16</a> Housekeeping and preliminary question finished<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=840">14:00</a> Question 1<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=970">16:10</a> &nbsp; Answer reveal, <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=996">16:36</a> further explanation<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1060">17:40</a>, Question 2<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1210">20:10</a> &nbsp; Answer reveal, <a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1240">20:40</a> further explanation<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1322">22:02</a> Pen and paper, (cos(x))^2 = (1+cos(2x))/2<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1382">23:02</a> Question 3<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1428">23:48</a> &nbsp; &nbsp;(Accidental answer reveal)<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1526">25:26</a> &quot;You think it&apos;s about triangles, but really it&apos;s about circles.&quot;<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1569">26:09</a> Sin(x) animation<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1650">27:30</a> Cos(x) animation<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1731">28:51</a> Question 4<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1845">30:45</a> &nbsp; Answer reveal<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=1980">33:00</a> Pen and paper, Soh Cah Toa<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2085">34:45</a> Question 5<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2222">37:02</a> &nbsp; Answer reveal and explanation<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2391">39:51</a> Pen and paper, Unit circle<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2510">41:50</a> Radians and degrees connection<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2580">43:00</a> How do you compute these values?<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2652">44:12</a> Special right triangles<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2732">45:32</a> Question 6<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2775">46:15</a> 3b1b answers, Do you use pen or pencil?<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2840">47:20</a> Q6 Reveal<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2910">48:30</a> Question 7<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=2981">49:41</a> &nbsp; Answer reveal<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3074">51:14</a> Pythagorean theorem connection<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3290">54:50</a> New page, Question 8<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3445">57:25</a> &nbsp; Answer reveal<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3583">59:43</a> Back to cos^2 (x)<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3720">1:02:00</a> Question 9<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=3865">1:04:25</a> &nbsp; Answer reveal<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=4140">1:09:00</a> Where is tan(x)? Where is cos^2 (x)?<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=4306">1:11:46</a> Tangent animation<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=4350">1:12:30</a> Final Question<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=4474">1:14:34</a> The &apos;hackerman comment&apos;<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=4516">1:15:16</a> Final question, answer reveal<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=4601">1:16:41</a> Animation<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=4665">1:17:45</a> Back to the tower problem<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=4920">1:22:00</a> Fully labeled and explained triangle<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=5034">1:23:54</a> Textbook formula connection<br><a href="https://www.youtube.com/watch?v=yBw67Fb31Cs&amp;t=5108">1:25:08</a> Goodbye, Patreon supporter screen<br><br>Fin

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