Question

If sinA = 8/10 ,then find the value of cosA​

Answer 1

Answer:

cosA=6/10

Step-by-step explanation:

sinA=8/10

,√(1-cosA^2)=8/10

,1-cosA^2=64/100

,cosA^2=1-64/100

,cosA=√(36/100)

so,cosA=6/10

Answer 2

Answer:

sin A=8/10

then p/h=8/10

b2=h2_p2

b2=100_64

underroot 36

=6

cos=b/h=6/10