FREE TUTOR THREAD except I'm not that smart and I basically will research whatever to help you learn it
I know: Chemistry, physics, biology, algebra, calculus and geometry
FREE TUTOR THREAD except I'm not that smart and I basically will research whatever to help you learn it
Michael Robinson
Other urls found in this thread:
en.wikipedia.org
twitter.com
Adrian Morris
how to lean Trigonometry
Juan Evans
how do i remember math? if a person says something times this- i'll can't tell you but a game i get them correct.
James Williams
Trigonometry is how to do functions like cosine, sine and tan, lemme look it up because I forgot everything about that
Dominic Gray
Liam Sanchez
Cooper Myers
So just to reiterate what's on the picture, so Sine is the angle opposite over the hypotenuse.
sineA=opposite/hypotenuse=a/c
cosA=adjacent/hypotenuse=b/c
tanA=opposite/adjacent=a/b=(a/c)/(b/c)=sinA/cosA
Landon Gray
so we can see that since we're always dealing with right triangles with a 90 degree angle, the side farthest from the 90 degree is always the longest (see c on the diagram). This is called the hypotenuse
Henry Thompson
so what you want are multiplication tables
The easy way to do math quickly is called common core, and it's the way to turn things that are not familiar into something familiar quickly and do it and then get the difference to the result
Evan Baker
Carson Reyes
Joshua Miller
So essentially with these 6 formulae you can take what you know about any triangle, as long as you know two sides and and angle or two angles and a side, to reason your way to all the other information
Andrew Parker
So what we're going to do with the multiplication tables is we're going to memorize them one step at a time
The first thing that is easiest, is 0 times anything is 0, and 1 times anything is always the same number
Joseph Perez
Isaac Flores
So since what we know about angle HX is that it is 51 degrees, and we know the value of the opposite side 10, we're going to apply a formula to figure out H first
Brandon Foster
sinA=opposite/hypotenuse so that's going to be our useful formula to figure out H, the hypotenuse
sin(51)=10/H
Julian Howard
we plug that in and the value we get for sin(51) is 0.67022917584
So 0.67=10/H
Parker Gray
sorry that sin calculator is wrong what we wanted for the sin(51) was 0.7771459614569708799799377436724
Chase Morgan
so 0.78=10/H
Multiply both sides by H and we get
0.78H=10
Divide both sides by 0.78 and we get
H=10/0.78=12.82
Carter Perez
Levi Jones
This example they are rounding to 2 significant figures so we're just calling H 13
Now we want to find x, and the useful formula for us is tan.
tanA=opposite/adjacent
so tan(51)=10/x
or by conversion, x=10/tan(51)
We get that conversion by multiplying both sides by x
x(tan51))=10
and then dividing by tan(51) on both sides
x=10/tan(51)
Jace Reyes
Please stop. I just remembered all this from Geometry.
Ryan Hill
ok I am going to help multiplication bro
So multiplication we're just going to have to memorize 1-12 and get a baseline you can refer back to for lager numbers
Let's start with squares, or numbers x themselves
1x1=1
2x2=4
3x3=9
4x4=16
5x5=25
6x6=36
7x7=49
8x8=64
9x9=81
10x10=100
11x11=121
12x12=144
So we're just going to memorize those to start, 1-5 are really easy but they get harder from 6-12 so I'm going to show you a shortcut if you forget
Lincoln Miller
10's and 5's are really easy because anything x10 you just add a zero, like 10x3=30 and 133x10=1330
Really easy right?
5 is anything times ten divided by two.
so 5x30=300/2=150
5x198=1980/2=990
and so on
Common core is a way to do math quickly, we can get there by doing multiples of 10 and then adding or subtracting the rest.
So 569x11 is going to be the same as (569x10)+569=5690+569=6259
Camden Sullivan
So let's say you are in the US and you want to give a tip
If you want to give 15% the easy way to multiply it by common core is to take 10% and then multiply it by 1.5
Nicholas Anderson
So if my bill is $60, the tip is (6+3)=9$