Question

Look at the triangle.

What is the value of cos x°?

8 ÷ 17

17 ÷ 8

15 ÷ 17

8 ÷ 15

Answer 1

Where is the triangle my friend :)

Answer 2

Btw,Cosx=B/H

Answer 3

So, what's the cos X? Iv'e never heard of that.

Answer 4

cos x = contiguous side of the angle / hypotenuse

Answer 5

ah, okay. ;D

Answer 6

Cos(x) is actually a trig function.

Answer 7

one easy rule to memorize it is to remember COS - CONTIGUOUS

Answer 8

sen x = opposite side of the angle / hypotenuse

Answer 9

tg x = opp / cont

Answer 10

tg x is also sen x / cos x

Answer 11

I have never heard of these terms before.

Answer 12

(honest.)

Answer 13

they are trigonometric functions that are deduced from the goniometric circunference, i'll show you one

Answer 14

the only thing about this circunference is that is radius is 1, not 1 meter or anything, just the unit.

Answer 15

ill show you

Answer 16

Well.

If that is the thing.

You need to get an intuition on what these things are :)

You should go to khan academy

But,

I can show you some things.



Hypotenuse is the largest side.

Answer 17

Ah,i see. :D

Answer 18

http://thespectrumofriemannium.files.wordpress.com/2012/08/goniometric1.png?w=590&h=572

Answer 19

Let me continue with the trig fuctions.

Sinx=perpendicular/hypotenuse

Cosx=base/hypotenuse

tanx=perp/base

You can learn these formula by this easy sentence

Some people have,curly brown hair,tail painted black.

Answer 20

okay. :)

Answer 21

what do you know about triangles?

Answer 22

Does Pythagorean Therom work?

Answer 23

Now back to your problem i guess



Sinx=perpendicular /base

Answer 24

it only works for right triangles

Answer 25

But this is a right triangle.

Answer 26

yes but you already have everything, every value

Answer 27

no need to calculate it

Answer 28

Well we use the pythagoras theorem to find the missing sides in a rat not sinx.

So no,
Btw,

the pythagoras formula is

(hypotenuse)^2=(perp)^2+(base)^2

Answer 29

It is very easy to do your problem :)

Just put in the values and check your options no need of calculator.

Answer 30

http://2.bp.blogspot.com/-C7kYGneYkrQ/UDs90CA-_tI/AAAAAAAAAbk/sHhJpYzqxlg/s1600/21.png

Answer 31

k. ;)

Answer 32

opposite = adjacent

Answer 33

If you follow @GCR92

Sinx=Opp/Adjacent

Answer 34

also this is probably the most important thing in high school mathematics, is the base of ALL applied math, even the most complex thing you can think of relies on the pythagorean theorem and the trigonometry

Answer 35

and not to mention physics as well

Answer 36

If you need a proof on the Unit circle thing,Go watch a khan academy vid :)

Answer 37

ok.

Answer 38

just use the easier terms for you, for me it is: