A step ladder is not something that you calculate!
The six basic functions of trigonometry are the sine, cosine, tangent, cosecant, secant, and cotangent functions. Abbreviated sin, cos, tan, csc, sec, cot.
One method is to use trigonometry.
It is used to calculate the trajectories of projectiles and missiles.
It depends what you need to calculate. There are various formulas for this. It is a branch of mathematics called trigonometry.
trigonometry is often used to calculate distances from certain locations
Oceanographers use trigonometry to calculate the height of tides in oceans
With a protractor or use trigonometry if you know its dimensions
Trigonometry is used for various measurements of right angle triangle. so if you know height and base and incident angle then you can calculate other factors of triangle. Trigonometry is very useful in algebra too! in exam you can get mathematical problems which are included sin, cos, tan, cot, sec, cosec. Firstly it may appear boring. but once you understood then it will much interesting like puzzle. It is very useful to engineering. i hope this answer is useful.
'by using this formula , Q=A*V, M3/Sec=M2*M/Sec'
With Pythagoras' theorem or trigonometry depending on the information you are given.