Look at the figure below:

if sin y° = 9 divided by c. and tan y° = 9 divided by d. ,what is the value of cos y°?

a.) cos y° = 9c
b.) cos y°=c divided by d.
c.) cos y°=d divided by c.
d.) cos y° = 9d

answer: option c.

step-by-step explanation:

remember the following trigonometric identities:

then, knowing that:

you can identify that the angle is y°, the adjacent side is and the hypotenuse is .

then, you have to substitute them into   . so you get:

(which matches with the option c).

the answer is:

c)

since it's a right triangle we can find the correct answer using the following formulas:

where,

x is the base of the triangle

y is the height of the triangle

h is the hypotenuse of the triangle

so, using the given information we have that:

where:

also, we know that:

where,

therefore,

the correct answer is

c)  

have a nice day!

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

42

step-by-step explanation: