Class 9th - Federal Board - Trigonometry & Bearing

[tame remnant]

Hey Guys! I'm currently studying in class 9th, the course is of Federal board. I'm having so much issues with chapter "Trigonometry and Bearing". I would be glad if someone can help me out.
DMs are surely available.

[frail quail]

What do you need help with in Trigonometry? Try asking a question or two

I would be glad to help

I can surely help

And if no questions, try watching some visualization videos on YouTube to get a better insight, will help a lot

https://youtube.com/shorts/77vlRweCtGE?si=BTOWYjG1ZI0UORcZ

And practice identities !

[timid trail]

Hello, I am good at trigonometry, I can help

[frigid dune]

Grade 9 trigonometry is just sine rule, cosine rule, angle properties, and stuff

bearing is just angle from the north line

do you have an example problem?

[tame remnant]

Hi there. That's really nice.
I would be glad about it.

[tame remnant]

For me, that's the main issues. I can't seem to understand it. Especially those trignometric identities

[tame remnant]

I can't seem to make it properly

Lemme show an example problem @frigid dune @timid trail

[frigid dune]

are you familiar with all these formulae?

[tame remnant]

😭 Nope.

[frigid dune]

if you do, you have all the tools necessary to solve trigonometry problems

[tame remnant]

I'm not familiar.

[frigid dune]

at minimum,
$$\frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C}$$
and
$$a^2 = b^2 + c^2 - 2bc\cos A$$
and
$$\triangle = \frac 12 bc\sin A$$

[frigid dune]

do you know those three?

[tame remnant]

Yeah, I do

But I only know these dunno how they are formed and where to use them

[frigid dune]

for the proof of these formulae, it's gonna be a bit long-winded but you can search them up yourself or look at your textbook if it explains them

i can help you with their applications though

[tame remnant]

Sure.

Before that

Lemme show you my book

This

[frigid dune]

ah i see

in that case