Question

hello.... could anybody help me in trigonometric ratios..

Answer 1

The 6 Trig Ratios. For any right triangle, there are six trig ratios: Sine (sin), cosine (cos), tangent (tan), cosecant (csc), secant (sec), and cotangent (cot). Here are the formulas for these six trig ratios: Given a triangle, you should be able to identify all 6 ratios for all the angles (except the right angle).

Answer 2

That's quite easy. Just learn this is order:
Sin Cos Cot Cosec Sec Tan
Once you're done with it, choose any one of the above, it will be equal to the next/next to next.

ie. Cos = Cosec/sec
and so on.
Then comes those,

sin² A + cos² = 1
cosec² A - cot² A = 1
sec² A - tan² A = 1


That's all you need to learn.