Solving simple trig equations

No video

Solving simple trig equations

Рет қаралды 141,532

5 жыл бұрын

A couple of examples of how to solve trigonometric equations involving a primary ratio (sine, cosine, tangent). These solutions use the CAST rule to figure out which quadrants the solutions will be in, then uses a calculator and some logic to find the solutions.

Пікірлер: 82

@VyPham-ki4lp 4 жыл бұрын

Thank you! I'm struggling so horribly with trigonometric equations. My class is onto the difficult ones and I barely understand simple ones... Time to teach myself what on earth my teacher is trying to teach me!

@ikerjimmy2696 3 жыл бұрын

I dont mean to be off topic but does anybody know of a trick to get back into an Instagram account..? I somehow forgot my password. I love any tips you can offer me!

@SHIV-uw2zj 2 жыл бұрын

@@ikerjimmy2696 you could reset your password

@justkrimzz3823 3 жыл бұрын

Thank you so much for this video!! I have searched for roughly an hour watching 20 or so videos, and none of them are as straightforward as this one!!

@amarhassenmohammednur4529 Жыл бұрын

Me too

@pronk4321 2 жыл бұрын

I missed a week's worth of class on this, u are a life saver!

@macktapp3389 2 жыл бұрын

Great video. I graduated highschool a few years ago, but i never did good at trig. One of those things they just ignore and then you move on. And just like that, in a few minute video, i have a far greater understanding of this. Thank you. You must be a good teacher

@ndounaben 4 жыл бұрын

Keep people with relevant videos, watch how to solve trigonometric equations, part 2 of 4 : kzfaq.info/get/bejne/rLGDepSlu8jQfoU.html

@spaghetboi5542 4 жыл бұрын

Thank you Brandon! I come from a school in Italy and for some reason here (also online) they make the process look so much more complicated.

@BrandonGrasley 4 жыл бұрын

I'm glad I could help!

@CPWG_Jawrence 3 жыл бұрын

I’m in the same boat now :)

@QueenPlays 5 жыл бұрын

O.M.G..I have remembered my high school times.Thank you Brandon.

@Kaitwof Жыл бұрын

Thank you so much! I've been so confused in my pre-calc class and my professor doesn't teach us anything at all so this made me understand so quickly!

@BryerArtStudios 2 жыл бұрын

Omg thank you so much for this video 🙏 I was sick the day my teacher taught us the lesson and I had no idea what I was doing 😭😭

@jeremyfisher8250 3 жыл бұрын

Thankyou for not draining my soul and keeping it to the point

@jonahrangel2013 4 жыл бұрын

Simple vid clear and simple 👌

@RandyVidz 8 ай бұрын

Thank you, you gave me a big aha moment when u mentioned that the inverse only goes to 180. But you can always take that number and do - and then 360 and then you get a positive value?

@iradukundafrank9021 3 жыл бұрын

So helpful l appreciate sir, God bless you

@uzaira9088 3 жыл бұрын

I finally understood this on the final day on exams,hail to the professors on yt OH HAIL

@DelibyTebulo 4 ай бұрын

Thank you for this video I've learn something new

@lakshanbandara1619 3 жыл бұрын

Simple and on the point

@DuraDeRapper-ng2kw 4 ай бұрын

Trig equations are well explained here❤💯

@timone15 2 жыл бұрын

Thank you this was very helpful!

@Dozee Ай бұрын

Thank you so much!

@Jason-vg8qo 7 ай бұрын

Thank you so much ! This really helps !

@amirdivan5799 Ай бұрын

Thank you so much

@ruthchambers6474 4 жыл бұрын

Great explanation 😁

@riydh274 3 жыл бұрын

I study in SAUDI ARABIA and you did me a favour , THANKS 😁

@Nawalsamer04 3 жыл бұрын

Same

@Nawalsamer04 3 жыл бұрын

It’s my fault the teacher teachers I play and now I am almost gonna fial my exam

@raedkorman Жыл бұрын

your video saved me

@amarhassenmohammednur4529 Жыл бұрын

Thank you very much

@torinmcmaster4849 3 жыл бұрын

Great video! Perfect

@yourriseon7 3 жыл бұрын

Sorry sir. Can I ask u. How we can solve the question if it looked like this: 3 sin (teta + 30°) = 7 cos teta Thank you

@BrandonGrasley 3 жыл бұрын

You need to modify the sin() function using an identity: en.wikipedia.org/wiki/List_of_trigonometric_identities#Angle_sum_and_difference_identities

@yourriseon7 3 жыл бұрын

Thank you sir

@BrightwellSianyama-rr3bm 2 ай бұрын

How do we solve this equation 5cosphiter=-3

@aztech8460 3 жыл бұрын

Thank you 🙏🏼

@Ggbaggio 2 ай бұрын

thank you omg

@densie_____ 2 жыл бұрын

Thank you

@cottonmint7880 3 жыл бұрын

I am sorry i am really slow but can someone pl explain to me why we subtract 60 from 360? Why not 180?

@sawdamacalin807 3 жыл бұрын

Cos is + in quadrant 1 and 4 so to find quadrant 4 u have to subtract 360 from the angle u have And first u have to learn reference angles that would help u alot

@strangeman4088 Жыл бұрын

thanks ❤

@augustineukpeyogwa6075 Жыл бұрын

Can we solve sin{3x}=1-cos{4x}?

@paromitaroy5861 3 жыл бұрын

Why is it 360-60 instead of 360-2(60)

@Hanky3 4 жыл бұрын

Why would the 217 not be negative if it is in the 3rd quadrant?

@BrandonGrasley 4 жыл бұрын

The angle in Standard Position in the third quadrant is positive (37° past 180°). The *sine* of the angle is negative because it's in the third quadrant, but the angle itself is positive.

@BrandonGrasley 4 жыл бұрын

In case it's helpful, I just made a new version of this video. It's here: kzfaq.info/get/bejne/qMx7ibmHqdDGgKc.html

@Hanky3 4 жыл бұрын

@@BrandonGrasley Yes! Thank you!

@hussainbaqar1656 4 жыл бұрын

Really helped

@BrandonGrasley 4 жыл бұрын

I'm glad!

@saminamubeen6731 3 жыл бұрын

Thanks alot

@nicholaspacheco8922 2 жыл бұрын

holy savior batman

@wholeloteditz2228 2 жыл бұрын

Why 180+37?

@tess3232 2 жыл бұрын

Yea… I’m dropping out

@dareenal-menaifi2430 4 жыл бұрын

What do I do if it’s csc?

@BrandonGrasley 4 жыл бұрын

If you have something like csc(x)=3.7 rewrite it as sin(x)=1/3.7 And then solve. All of the secondary functions cans be written as primary functions.

@dareenal-menaifi2430 4 жыл бұрын

Brandon Grasley ohh okay thank youu💜

@Shaquille69355 4 жыл бұрын

How would you do this if you couldn't use a calculator And nice video👍

@BrandonGrasley 4 жыл бұрын

For most angles you really need a calculator. For certain angles (30°, 45°, 60° and their multiples) the ratios are nice numbers and you can memorize them.

@Shaquille69355 4 жыл бұрын

@@BrandonGrasley thanks I'm learning about the unit circle but just wondered if you could get other numbers than just those. But thanks anyways

@jp9523 4 жыл бұрын

Yup... I want to learn without calculator... I so someone using the triangles of 45,45 and 30,60

@user-zh8re5ul3h 2 ай бұрын

For me to remember the ASTC diagram I used to substitute it as All Stupid Teachers Complain😅

@haidyashmawy3867 4 жыл бұрын

i couldnt understand why you did -180 and 180 in the last question can anyone explain why?

@BrandonGrasley 4 жыл бұрын

I was referring to how a calculator's inverse functions work. They don't give answers like 290⁰. Instead, they would give an answer like -70⁰. If you need a solution between 0⁰ and 360⁰ you need to convert the calculator answer into the right interval (generally by adding 360⁰ to the negative angle).

@haidyashmawy3867 4 жыл бұрын

@@BrandonGrasley ohhh okay thank you so much!