Given data :
AB = 15
BC = 8
AC = 6
1) sinA = perpendicular / hypotenues
In the given triangle , perpendicular is BC which is always opposite to the angle .
sinA = BC / AB
= 8 / 15
2) cosA = Base / Hypotenues
= AC / AB
= 6 / 15
= 2 / 5
3) tanA = perpendicular / base
= BC / AC
= 8 / 6
= 4 / 3
4) sinB = perpendicular / hypotenues
In given triangle , perpendicular is AC which is according to the angle which we have to find.
sinB = AC / AB
= 6 / 15
= 3 / 5
5) cosB = base / hypotenues
= BC / AB
= 8 / 15
6) tanB = perpendicular / base
= AC / BC
= 6 / 8
= 3 / 4