Question

Find the exact value of
cos(arctan (9/40)) how do I do this? :)

Answer 1

@jim_thompson5910 :) are you free?

Answer 2

let theta = arctan(9/40), so tan(theta) = 9/40

because tan = opp/adj, we can apply these labels

Answer 3

what is the hypotenuse?

Answer 4

41

Answer 5

is the reason that the opposite is 40 instead of 9 (since tan = opposite/adj) because it's inverse?

Answer 6

hrrm I think you got that backwards actually..

Answer 7

oh right, I did lol