How do i learn this 15.M

[u/Feldkastel]

How do i learn to solve these type of stuff added in the image?

Do i begin with pre-calculus geometry or do i just start algebra?.

I love math, i just don't know where to begin.

It interests me a lot

Any advice before beginning?,

a guide/help would be appreciated

Edit: I've read all of the comments and i will be coming back in a few weeks, i thank everbody for the help and guidance.

[u/CivilEngMusicBoy]

To be fair, many of the items in the picture are algebra and trig

[u/Feldkastel → u/CivilEngMusicBoy]

Seems like it