Question

If sin A=3/4 find cos A​

Answer 1

here, sinA=3/4

sin=p/h=3/4

p=3,h=4,b=?

h^2=p^2+b^2

h^2=3^2+4^2

h^2=9+16

h^2=25

h=5

we know that cosA=b/h

cosA=5/4