Question

If`tan A = .3` and A is in Q1, how do you go about finding sin A and cos A?

Answer 1

If `tan(A) = 0.3` and `A` is in Q1
(ignore the fact that the image below uses `x` instead of `A`

and
`sin(A) = 3/sqrt(109)`

`cos(A) = 10/sqrt(109)`