Introduction to Sum and Difference Formulas in Trigonometry (Precalculus - Trigonometry 25)

[@GhaliumHD]

I have finished all the calculus courses I have in my curriculum (Calc1 to differential equations), and I swear to God that the day I graduate from engineering and get a job, a portion of my first paycheck goes to Prof. Leonard. Thank you for everything!

[@user-fh2rw9zh8g]

Did you graduate yet

[@GhaliumHD]

@@user-fh2rw9zh8g im a 3rd year right now taking a specialization in power systems.

[@ebisagetachew992]

Yea did u

[@jerrymorales7333]

Thank you for sharing your knowledge with us. I watched your videos for Calc 1, Calc 2, Calc 3, and differential equations and got As in all four classes. Now I watch them just to learn more 🤓

[@tfwcryy]

I can't thank you enough for posting all these lectures. They are helping me so much. God bless you

[@March_iii_]

You are the hidden gem in Trigonometry.

[@tbeng12]

Hello professor Leonard, first of all wanted to thank you for bringing passion to Mathematics, I wanted to know is there any chance in the future you could do some more advanced stuff like Fourier Series, Laplace Transform, Complex integration etc. ? It could be really helpful for engineering students like myself.

[@WhimsicalAlec]

Take trigonometry fully online and your videos have been so helpful! Thank you!

[@onemanenclave]

Your teaching has become even smoother and clearer if that was possible.

[@surojpaul14]

100 lectures complete in precal. ,, take a bow🙌🙏

[@georgesadler7830]

Professor Leonard ,thank you for another beautiful video/lecture on the Introduction to Sum and Difference Formulas in Trigonometry. From reviewing this material, I found this material not too difficult, however it can be confusing or problematic. Using the Sum and Difference Formulas to solve problems is one way to master this topic.

[@colchi2547]

I personally recommend 3Blue1Brown’s lockdown maths playlist for an intuitive derivation of these formulas using the complex plane

[@raghavsood564]

Sir thank you so much for posting these videos. Your videos really helped me a lot to understand the stuff on which I was struggling before. Once again thank you so much

[@arnaldoperez4188]

Can't wait to get into this level. I'm still in intermediate algebra playlist but I'll get here. Thank you Professor Leonard!

[@canman5060]

You are almost there !

[@arnaldoperez4188]

@@canman5060 Yeah I know :)

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Hey where are you

[@2pacgilsi589]

😂 i guess he’s done ✅ with this sh^T

[@anweshbhattacharyya7763]

Prof Leonard you are my guru 😌❤️. How does an exponential function differ from a power function ?? The essential difference is that an exponential function has it's variable in it's exponent, but a power function has its variable in its base. For example f(x)=3^x is an exponential function, but g(x) = x^3 is a power function.

[@Alel1]

Wow, I just wanted a video to review this lesson, thanks for your hard work🌷

[@willcartershaves]

Love your work man. I knew you’d always do something fantastic bro. Love your intelligence

[@TheMoresnow]

Dope! This topic just showed up in my physics class. Thanks man!

[@dhickey5919]

Thank you for your help and inspiration.

[@user-fh2rw9zh8g]

Thank you teacher

[@2pacgilsi589]

merci beaucoup ☺️ prof

[@mohamedshahbain2985]

I didn't need precalc help I just clicked on the video to comment on that crisp fade

[@jiggybad2730]

looking good man, thanks for the video!

[@canman5060]

Addtional Mathematics in the good old British school Math syllabus.

[@GaryPwner]

Damn! Professor Leonard lookin nice with that haircut 👀👀

[@denizasr]

he looks a decade younger with that haircut!

[@ReniChris07]

Professor, please teach us Fourier series, Fourier transform and partial differential equations

[@Redexn]

looking fresh with the haircut prof leonard

[@queimec7269]

Thank you.

[@ojingaj30]

@ 25:15 -> 😂!! I’ve done that many times!

[@krupashah2119]

Hello! If we have cos (a + b), why can't you do cosa + cosb? Why do we instead do cosacosb - sinasinb? Same thing for sin and tan...

[@somasahu1234]

Did u skipped some vids ? Was it a mistake or intentional 🤔

[@The_Angry_BeEconomist]

fresh cut

[@Woodman34x]

Hey professor Leonard, I'm just kind of curious did you lose a bet or is something happening in your life that you got a different haircut? Kind of like when job when he was mourning the loss of family members

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Sir..are you okay? I wish you're on diet or something because you've lost a lot of weight...hope you doing well...and thank you sir for everything💜

[@dpmike32819]

Are you still in Chicago

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[@tfwcryy]

I think he lives in California 😅

[@Ayaa-A98.99]

Haider Walid, the foreign version

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nice haircut

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منو اجه من التيك توك

[@deanfarrimond7543]

First