Question

if sin A =3/5 then cos A=​

Answer 1

Answer:

cosA = 4/5

Step-by-step explanation:

sin²A + cos²A =1

(3/5)² + cos²A = 1

cos²A = 1- 9/25

cos²A = 16/25

√cos²A = √(16/25)

cosA = 4/5

Answer 2

Answer:

Sin A =3/5 ;sin theta =opp/hypotenuse

therefore, let cos A=x

(5) ^2=(3) ^2+x^2

25-9=x^2

16=x^2

4=x

therefore, cosA =4/5