Question

if cos 71° =A then sin?=A

Answer 1

Answer:

19°

Step-by-step explanation:

Draw a reference triangle, with one angle being 71°, then fill in the other angle because triangles have to add up to 180. 180-90-71=19. 19 is your missing angle because sin is opp/hyp.

Answer 2

Answer:

Step-by-step explanation:

hello :

let this value : y

you have : cosx=siny = A

cosx=siny  means : y= 90°-x        x = 71°

so : y = 19°