Question

Need help with precalculus will give owl bucks

Answer 1

Plz post ur problem

Answer 2

Invisible math? Awesome, tag Zarkon now ...

Answer 3

@Zarkon

Answer 4

I made a joke, dude :)

Answer 5

i didnt know

Answer 6

@Matlee, you can click "Ask Qualified Helpers" do be positive that you'll get the right answer. :) http://prntscr.com/9fjh0h

Answer 7

idk anytihng about areas of triangles

Answer 8

A=1/2*a*b*sin(th)

Answer 9

@jabez177 thank you

Answer 10

there are multiple formulas for the area of a triangle. You are probably familiar with A=1/2bh
well in this case, we arbitrarily take one side to be b (call it b), and the h is determined from h=a sin(th)

Answer 11

You're welcome! :) That's if you have OwBucks. :)

Answer 12

so in this case you can use 1/2*5*7*sin(27) to get your area.

Answer 13

What your a qualified helper

Answer 14

whats th?

Answer 15

o nvm u said a*b tho but i only have b and c do i still replace them

Answer 16

But it seems to me that @Inkyvoyd has it under control. :)

Yes, I am, @Matlee. :P But I'm not good at Pre-calculus. Math isn't my thing. :P

Answer 17

Bonjour

Answer 18

@inkyvoyd do i always use sin?

Answer 19

yes... this formula is actually a specific application of the cross product of two vectors (the geometric definition), although i would not worry too much about that yet

Answer 20

ok

Answer 21

Ok so when will i know to use herons formula

Answer 22

my teacher told me to use it for soem test review but i didnt know it

Answer 23

there are basically 3 formulas for the area of a triangle that are common.
1. A=1/2 bh you are probably familiar with this one.
2. A=1/2 a*b*sin(theta) this is the one we are using now
3. Heron's formula - this one is a bit long, but you need 3 side lengths to use heron's formula

Answer 24

Oh ok thank yo uthats very useful!

Answer 25

if you are given only 2 sides and an angle you will want to use 1/2 a*b*sin(theta) to make your life easier

Answer 26

but given 3 sides, it's easiest to use heron's formula.

Answer 27

do note that with trigonometry you can actually figure these things out without memorizing formulas, but the formulas make things a whole lot faster.

Answer 28

I will send your you owl bucks

Answer 29

I can't receive them :)
thanks though :3

Answer 30

Yes i have sent you 1, alsoi got 7.944 is that good

Answer 31

Did u receive the 1

Answer 32

o.o thank you

Answer 33

:p your welcome! Thank you aswell

Answer 34

@Inkyvoyd, you should apply for the Qualified Helper role! :)