If sin theta=3/5 THen cos theta wil be

Answer 1

sin Ø = 3/5 , so Ø could be in quadrants I or II

make a sketch of the triangle and you should recognize the 3-4-5 right-angled triangle.

the cosØ = 4/5 if Ø is in I
and cosØ = - 4/5 if Ø is in II