Question

how to deal with trigonometry and how to develop skills to think smartly in it

Answer 1

The main key is just to practice as many sums as you can specially from RD SHARMA

I know you must not be knowing how to start up the sun or how to think about that sum but that all will come when you solve sums by solving sums you will be experiencing different sums Everytime and hence your brain will also completely think in a different way and Ultimately a day will come when you will be pro in it