Question

if sinA =a/b then cosA =?​

Answer 1

Answer:

C/b because you have to take base as another unit so I have taken c as base

Answer 2

Answer:

cosA=√b²-a²/b

Step-by-step explanation:

Here by Sin A= a/b =Perpendicular/Hypotenuse,

therefore By Pythagoras Theorem

:H²=P²+B²

:b²=a²+B²

therefore, B=√b²-a²

Hence, Cos A= √b²-a²/b = Base/Hypotenuse