Find the exact value of the six trigonometric functions of 0

(0 is not the number zero I don't know what its called)

I have to find r first.

r=sqrt x^2+y^2

r=sqrt -5^2+-4^2

r=sqrt 41

sin=y/r

sin=-4/sqrt 41

cos=x/r

cos=-5/sqrt 41

tan=y/x

tan=-4/-5

csc=r/y

csc=sqrt 41/-4

sec=r/x

sec=sqrt 41/-5

cot=x/y

cot=-5/-4

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40