Question

Find cos45degrees

Answer 1

1/sqrt(2)

Answer 2

that's the answer.

Answer 3

http://media.education2020.com/evresources/2090740_6784a93e-d2f8-4ccd-a982-7c20f9954182.png

Answer 4

\[\cos\theta = \frac{\text{adj}}{\text{hypo}}\]

Answer 5

ok

Answer 6

-_-

Answer 7

what

Answer 8

ok

Answer 9

whats goin on

Answer 10

trigonometry ?

Answer 11

yea

Answer 12

we know the hypotenuse, from pythagorus

Answer 13

idk what a pythagorus is

Answer 14

pythagorus says, for a right angled triangle of sides a,b,c
a^2 + b^2 = c^2


in our case
1 + 1 = 2

Answer 15

ok then what?

Answer 16

so the anmswer is 2?

Answer 17

nope

Answer 18

hypo^2 is 2

Answer 19

ok whats next

Answer 20

so hypo is √2

Answer 21

so that over 2

Answer 22

so

cos 45 = adj / √2