Trigonometry

[fresh rock]

decide cos 30* with help from the figure, show your work

idk how to get to the answer

but its √(3) ÷ 2

[solid nacelle]

First of all how can we even do it,,
It is not a right angled traingle na..
So we can't apply trigno over it

[fresh rock]

You are new hear i see

[fresh rock]

You just divide the triangle in the middle

then you get 2 identical right angled triangles

[solid nacelle]

Oh got it

But how is the question

Pls explain it to me

[fresh rock]

its confusing but

decide cos30 with the help of the figure

[solid nacelle]

Yes but how does that mean
You must have done questions like this before na

[fresh rock]

nope

idk its quite confusing

what grade are u in or like taht

[solid nacelle]

I think we can prove this by pytho
We r supposed to prove that why cos 30 is root 3 by 2 with the help of the given diagram

[fresh rock]

yes

[solid nacelle]

I'm 16 years old but I know a lot about matjs

Let me try

[fresh rock]

alr

you should try do this one instead

[solid nacelle]

The answer has to be this
We just need to show if somehow

[fresh rock]

yeah tbh just ignore that one its weird

[fresh rock]

do this one

[solid nacelle]

Don't know that language

[fresh rock]

ye but

basically

just calculate X

[solid nacelle]

No it's not that hard

[solid nacelle]

Ok

[fresh rock]

alr

[solid nacelle]

So I think this is how we r going to do it
Firstly in the left most traingo of 20 degreee angle, we find the value of half a

Similarly in the 15 degree traingle we get the value of the remaining value of a from there.

Now add these values to get the full traingle A.

Now we can use the angle sum property on traingle ab and the left most corner..

As we already know angle a and by adding 20 in 90 we can get the value of the left most corner of the traingle which will be 110.

After that we will get the value of the left part of 15 degree angle. After angle sum property

Finally we form a line and find x
Ufff😮‍💨

@fresh rock

is this right?

[fresh rock]

What is X then

hm

[solid nacelle]

It will lie between 100 to 120

90 to 120

[fresh rock]

X?

[solid nacelle]

Yes😶

No

[fresh rock]

You want to know the answer?

[solid nacelle]

That replies

[fresh rock]

alr

[solid nacelle]

That answers

[fresh rock]

but its not between 90-120

[solid nacelle]

😞

But what's wrong with my methodology?

[fresh rock]

idk tbh

[weak terrace]

youll be more likely to recieve help if you translate the text in the image

[solid nacelle]

It's just find x

[fresh rock]

Legit first message

Oh the other one nvm

[viscid swift]

Cos of 30 is sqrt3/2 because cos is the X or the adjacent