Sinusoidal functions word problems

[@Tom-tv1vu]

Best math teacher ever!!!! (W Mrs. Park)

[@aaranykugendran7226]

Better than Khan Academy! thank you, Ms.Park!

[@youtubemagic8087]

Woahh

[@Nathaniscool07]

Why is it 360 and not 2pi for the k value?

[@naxalar]

Not sure if this is still an issue but the audio transitions between the speaking audio and the music audio is an order or 2 of magnitude higher and blew my speakers, just saying. Everything else is spot on.

[@carinapark3795]

I know, and I'm sorry. It's part of the "charm"? Glad you found it helpful anyway. :)

[@JayfromtheTO]

Very helpful! Thanks Ms Park

[@honestman276]

Thanks. From Bangladesh.

[@jonthebob2159]

Just learned a whole months worth of work in 20 mins 😅

[@IODell]

I really appreciate this video. Very instructive. At 14:52 I suppose the equation could also be expressed as y = - 0.3 cos (144t) +1.8?

[@carinapark3795]

Correct!

[@timpitkin7929]

Why do you divide 360 by the period while in other problems I've seen this: period = 2pi/b? Is there a general rule for when to use either of these? Does the type of problem determine the method? I get that 2pi = 360, but the subsequent values are not equal.

[@carinapark3795]

I am not sure what you mean by "b"? The number in the denominator is the number of cycles in 360 degrees (or 2 pi). For example if the denominator is 5 then that means 5 cycles take up 360, so each cycle is 72.

[@amandacollins7570]

very helpful thank you!

[@IODell]

Thank you for posting. Please clarify at 2:04 you indicate the PS as 30. I was previously instructed that it was calculated by c/b which would be 30/3 in this example making the PS 10. I'm confused.

[@carinapark3795]

Joe, if it was 3t-30 instead of 3(t-30), then you would factor out the 3 and the phase shift would be 10.

[@Pillzxyz]

How do you determine the value of K if only given the maximum and minimum?

[@lightblade4447]

Sorry this is old and you probably already got an answer, but if the distance between a max and a max, or a min and a min, is a full period. That means that the distance between any given max and min points that are next to each other should constitute half a period. As such, you just have to double that in order to get the period. The k-value can then be found using the 360/period.

[@Pillzxyz]

@@lightblade4447 Thank you. Although I've already found the answer, but this is helpful.

[@lazsa3433]

@@lightblade4447it did even help me thanks

[@andreaandfriends1361]

Nooo way.........I was just working on the wp and 13:40

[@maykielmarkvelasquez9054]

Sriebu muoebu nsbhrui nwh

[@Ashaps-ft5xj]

First

[@ryanmaina8994]

isn't it cosign for the 3rd one

[@ryanmaina8994]

I mean the one at 13;58

[@carinapark3795]

Can be either sine or cosine - depends where you start your cycle.

[@austinlai9670]

This is terrible

[@danielgao6405]

it is good

[@ivanhuynh9846]

🤡

[@joeygouper1168]

🤡

[@jaeyonglee5775]

I must disagree, Austin.

[@johnmiles2726]

I think This is a fantastic video