Question

If Sin A = 3/5 Then Cos A = ​

Answer 1

Answer:

using Pythagoras theorem

perpendicular=3,Hypotenuse=5______________________

H² = P² + B²

(5)² = (3)² + B²

25 = 9 + B²

25-9 = B²

B² = 16

B = √16=√4×4

B = 4

Cos A = Base / Hypotenuse

Cos A = 4/5

Answer 2

Answer:

4/5

Step-by-step explanation:

adj=3

hypo=5

opp=?

(hpy)power2=(adj)power2+(opp)power2

5power2=3power2+x

xpower2=25-9=16

x=4

therefore cosA=4/5 (opp/hyp)