Question

Finding values help please.

http://prntscr.com/2m7leo

Answer 1

what do you need to find the value of?

Answer 2

Triangle 1:

A right-angle triangle.
Use the Sine rule for finding "h"

Sin = Opposite/Hypotenuse

sin 60 = 3/h

h = 3/sin 60

h = 3.464

Answer 3

For g would that be tan rule?

Answer 4

You can use the Sine rule for "g" also.

sin 30 = g/h

sin 30 = g/3.464

3.464 sin 30 = g

g = 1.732

Answer 5

And yes, you can also use Tan rule for "g"

Answer 6

tan = opposite/adjacent

tan 30 = g/3

Answer 7

Well does it make a difference what I write on the line? like should I write g=1.7 or g/3 does it make a difference? How do I choose which rule to use? like for I and J would I use SIN as well?

Answer 8

Sine = Opposite/Hypotenuse
Cosine = Adjacent/Hypotenuse
Tangent = Opposite/Adjacent

You need to use these according to what the values you have in the Figure/Triangle.

You can memorize this like:

SOHCAHTOA
Sin-Opposite-Hypotenuse-Cos-Adjacent-Hypotenuse-Tan-Opposite-Adjacent

Answer 9

And you need to write the final answer on the Line. It would be "g = 1.732" or if the question asks you to round it off, do that. If there are alot of numbers after the decimal, just write 2-3 numbers which come after the decimal.

Answer 10

Like if the answer is:
1.92839473682

You would write:
1.928
OR
1.92

Answer 11

Okay gotcha, so for I would you involve 30 and sq6 to find the outcome of I?

Answer 12

Exactly! :)

Answer 13

Now use:
SOHCAHTOA

Sine doesn't work here.
Cosine doesn't work here.
Tangent works here.

Use tangent to fine "i"

P.S: You would write it as "i" and not "I". Need to make sure if the alphabet is Capital or not!

Answer 14

Now try finding "i". If you need help, im waiting here.

Answer 15

Well if it's Opposite/Adjacent does it mean i is involved with sqrt6 or am I looking at it wrong?

Answer 16

Like i is opposite sq6 is adj

Answer 17

You will use the angle 30. The opposite to angle 30 is "i" and Adjacent is "sq6".

Remember, Hypotenuse is the Opposite side of the 90 angle.

Answer 18

so I do 30/sq6?

Answer 19

nono, you do this:

(the rule you are using sin/cos/tan) (angle) = (side 1)/(side 2)

You are using the rule:
tan

The Angle is:
30

Side 1 (Opposite):
i

Side 2 (Adjacent):
sq6

Answer 20

so is i 2?

Answer 21

If I'm looking for i all I have to work with is sq6 right? since we disregard angle 30

Answer 22

tan 30 = i/sq6

Answer 23

We will not completely disregard angle 30. It is essential. We put the angle in front of the rule we are using then an equals sign and after that the 2 sides divided.

Answer 24

That's the problem I have I don't know what to do with 1 when dividing?

Answer 25

I mean i

Answer 26

This would be easier to explain like this:
sin (angle) = Opposite/Hypotenuse
cos (angle) = Adjacent/Hypotenuse
tan (angle) = Opposite/Adjacent

Now we put in the values involved in finding "i":

tan (angle) = Opposite/Adjacent

tan (30) = i/sq6

sq6 * tan (30) = i

(the sq6 is taken to the other side of equals sign, it is being divided on the right side, when taken to the left side, it will multiply with whatever it is there)

[USE CALCULATOR]

1.4142 = i

Answer 27

get it?

Answer 28

Lol I'm trying and I sound like a broken record but I don't know what you plugged into a calculator to get that outcome. So multiply it with the given 30?

Answer 29

If i could take a picture of my calculator... :P

Wait a second...

Answer 30

There...

Answer 31

OHHHH wow okay, I need to buy one of those for home the school gives us them for class only :c

Answer 32

Ask for a "Scientific Calculator"

Answer 33

That makes so much more sense now lol

Answer 34

Thank you for helping me lol must have been annoying, I appreciate you taking the time to show me how to do it

Answer 35

Get this calculator:

Answer 36

Without these, you CANNOT do Sin/Cos/Tan rules...

Answer 37

You're Welcome! Anytime!! :)

P.S: You are WAY better than most of the people I've helped.

Answer 38

So, I should probably solve the "i" and "j" for you before I leave...

Answer 39

you don't have to, no obligation

Answer 40

I'll do it anyways, bored and this is easy so... :D

For "i":

tan (angle) = Opposite/Adjacent

tan (30) = i/sq6

sq6 * tan (30) = i

i = 1.414213562

i = 1.414

For "j":

sin (angle) = Opposite/Hypotenuse

sin (45) = i/j

sin (45) = 1.414/j

j = 1.414/sin (45)

j = 1.999697977

j = 1.999

OR Round off:

j = 2

Answer 41

Whoa, I appreciate the gesture! Better than showing up in class saying I didn't have the calc :p you're a lifesaver thank you so much!

Answer 42

Like I said, Anytime! ^^

Hardly took a Minute!

P.S: Don't tell in Class that you didn't have a Calculator because they will ask how did you do the Question then xD

Answer 43

LOL yeah I didn't think of that :p, good call. Okidokie I'm off to go to tutoring, thanks once more can't thank you enough!

Answer 44

No Problem!

If you think I saved your life then fill this out:
https://docs.google.com/forms/d/11TgMbGrlI1NKzvcP2noXD-KBquj0eXLvaHcZqS61Wlc/viewform

jkjk

u can if u want :P

Answer 45

Filling it out now

Answer 46

✧_✧
LoL! Can't Thank you enough!

Answer 47

Done! Have a good one :)

Answer 48

Goodluck!