Sum and Difference Formulas

How to use the Sum and Difference Formulas to find the exact value of the sine, cosine or tangent of an angle.
0:12 Formulas for sine, cosine and tangent sum and difference formulas
1:09 Example 1 Finding 7pi/12 using the sine sum formula
3:31 Example 2 looks at condensing a cosine sum expression
4:37 Example 3 looks at working with the tangent difference formula
Related Videos:
Double Angle Formulas:
• How to Use Double Angl...
Half Angle Formulas:
• Half Angle Formulas - ...
Looking to raise your math score on the ACT and new SAT?
Check out my Huge ACT Math Video Course and my Huge SAT Math Video Course for sale at
mariosmathtutor...
For online 1-to-1 tutoring or more information about me see my website at:
www.mariosmatht...
Organized List of My Video Lessons to Help You Raise Your Scores & Pass Your Class. Videos Arranged by Math Subject as well as by Chapter/Topic. (Bookmark the Link Below)
www.mariosmatht...

[@meganterry3864]

SO helpful and the video isn’t unnecessarily long. Straight, to the point, and explained in a clear understandable way. MUCH appreciation to you!

[@nickymujica7811]

thank you so much for this channel. Your videos are amazing and they’re very short but you do such a great job explaining things.

[@MariosMathTutoring]

You’re welcome Nicky! Glad you are liking my channel and my videos are helping you!

[@crypticsandwalker]

I use your videos in stead of the ones provided by my math classes and they help me understand the concepts much faster.

[@lesliepalmer3242]

Your method of converting to degrees makes so much sense and saves so much work. This is incomparable to my online professor's attempt at video for this lesson. Thank you for all you do, Saint Mario!

[@apothe6]

This might be the best video explaining how to find exact values using the sum and difference formula. Thank you Mario. It's super helpful and covers every detail.

[@MariosMathTutoring]

Glad it was helpful!

[@erynvonhusen251]

Your videos are appreciated! I know I can watch your videos and understand within 10 minutes! Thank you.

[@MariosMathTutoring]

Glad you like my videos Eryn! And glad they are helping you!

[@katiepotter1357]

Awesome job. Very concise explanations with great examples. Hope you keep on making videos! :)

[@MariosMathTutoring]

Thanks Katie! Glad you liked the video ...hundreds more videos like this one on my Mario’s Math Tutoring channel and new videos uploaded weekly!

[@yettispaghetti6784]

Thanks for the help, I would've probably been stuck staring at my homework problems for hours without this video!

[@alexiayeraldin5697]

Hello Mario, on your last example problem using tangent. For the sine of u which was -5/12 you just put 5/12. You corrected the cosv but not the sinv. I just wanted to point that out. Great video!

[@fly4lyf_213]

I'm also confused. He then changed the problem to sine u = 5/13, and puts 5/12 on the tan formula.

[@chariceaugustine6585]

You're amazing...thankss

[@MrRyanrichardson1999]

Praise be to you Mario, you are on your way to sainthood. thanks for the help

[@MariosMathTutoring]

You’re welcome Ryan! Glad my video helped you!

[@Charlie-dx6bv]

Thanks this helped

[@MariosMathTutoring]

Your welcome!

[@elysiaramsey3248]

so if the original is an addition will the right side sign be addition as well or is it flipped?

[@shawnpuri1829]

tysm for this!

[@MariosMathTutoring]

You’re welcome Shawn!

[@mereditha6597]

yesss so good

[@spiderthatjumps]

this is the mercy the universe provides when I fall asleep in math

[@world1syours]

ur a god

[@MariosMathTutoring]

Glad you like my videos Akshit!

[@emilyvinet4604]

you should've worked out the tan problem :(

[@Bravybrown]

I forget you can use pi instead of 1😬

[@chirayumanjrekar303]

IT'S A ME MARIO. 🥖 WOOHOO