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.
hello :
let this value : y
you have : cosx=siny = A
cosx=siny means : y= 90°-x x = 71°
so : y = 19°
