99% Get This WRONG. Here's Why.

[@NumberNinjaDave]

How can you make the two expressions ALWAYS be equal? Let me know below! Want to become a MASTER NINJA 🥷 ? Join this channel for special dojo perks! kzbin.info/door/vFC_QgDEteF5Bawvw3i18Ajoin Make sure to SUBSCRIBE HERE ⬇ so you don’t miss my tips and tricks for your next exam! tinyurl.com/numberninjadave Gear Up for the Dojo! 🥋 Before you enter the Number Ninja Dojo, you gotta look the part! Grab some awesome Number Ninja swag and show your dedication to mastering math. Shop the collection here: tinyurl.com/numberninjaswag (Affiliate Links Below - As an Amazon Associate I earn from qualifying purchases.) Level Up Your Math Skills with These Must-Haves: 📚 * Conquer Exam Anxiety! 😫➡😌 My book, “Hey Anxiety, Thank You!” is packed with proven strategies to help you master calculus, banish test-day jitters, and ace your exams by first taking care of YOU. Get your copy here: amzn.to/3Y2LWKv * Crush the AP Calculus Exam! 💥 This comprehensive study guide will equip you with the knowledge and practice you need to dominate the AP Calculus exam like a true ninja. Get yours here: amzn.to/3N5pjPm * The Ultimate Calculus Companion: 🧮 This graphing calculator was my trusty sidekick throughout college. It handles complex calculations with ease and never let me down. Get yours here: amzn.to/4eBNeRS * Precision Engineering: 📏 For precise measurements in engineering and other technical fields, this ruler is a must-have. It's durable, accurate, and built to last. Grab yours here: amzn.to/4doupRk Behind the Scenes: My KZbin Toolkit 🛠 I use VidIQ to help create the best possible KZbin videos for you! VidIQ helps me optimize my videos, research keywords, and understand what viewers are looking for. If you're a content creator, I highly recommend checking it out. You can sign up here (and I’ll get a small commission if you do): vidiq.com/numberninjadave

[@profmariogutierrez]

very interesting video

[@NumberNinjaDave]

Glad you liked it

[@supk7793]

great video and production quality man, if i hadnt checked I would have thought it was a huge account

[@NumberNinjaDave]

Much appreciated!

[@3eH09obp2]

Okay but if we're sitting in some function space where functions are only defined up to sets of zero measure, such as sobolev or L^p, then they are equivalent!

[@NumberNinjaDave]

Yeah, you can definitely manipulate the domains or R to gain equality.

[@huhnturr]

The discussion of domain makes no sense 1:09 to 1:19. You say that both functions have the same domain, and then say "therefore it can't be the case that these two expressions equal each other everywhere". That is nonsense. Since tan x goes to infinity at places where cos x goes to zero, 1/tan x also goes to 0. In the places where tan x goes to 0, sin x also goes to 0, so the fraction is finite and well defined. There is therefore no domain restriction to this identity and the conclusion of your video is incorrect.

[@NumberNinjaDave]

Sin x and cos x are the same. As for the original expression, have you tried graphing it as is? What do you get? That’s your homework.

[@ananttiwari1337]

good video

[@NumberNinjaDave]

Thank you