Question

if sin A = 3/5 than calculate cosA​

Answer 1

Answer:

$sinA = \frac{3}{5} \\ cosA = \sqrt{1 - {sin}^{2}A } \\ cosA = \sqrt{1 - ( { \frac{3}{5} })^{2} } \\ cosA = \sqrt{1 - \frac{9}{25} } \\ cosA = \sqrt{ \frac{16}{25} } \\ cosA = \frac{4}{5}$

Answer 2

$cos \: A = \frac{4}{5}$