Question

What is cos C?https://static.k12.com/calms_media/media/1422500_1423000/1422777/1/3e0ad8d1a34298da1bf1f77ee4c1e5141ff6ca40/MS_PA_131002_171225.jpg
a.
77 over 36
b.
77 over 85
c.
36 over 77
d.
36 over 85
I got b see if i am right

Answer 1

Here is some thing a site i find
Sine, Cosine and Tangent

Three Functions, but same idea.

Right Triangle

Sine, Cosine and Tangent are all based on a Right-Angled Triangle.

Before getting stuck into the functions, it helps to give a name to each side of a right triangle:
triangle showing Opposite, Adjacent and Hypotenuse
"Opposite" is opposite to the angle θ
"Adjacent" is adjacent (next to) to the angle θ
"Hypotenuse" is the long one
Opposite, Adjacent and Hypotenuse
Adjacent is always next to the angle

And Opposite is opposite the angle

Sine, Cosine and Tangent

Sine, Cosine and Tangent are the three main functions in trigonometry.

They are often shortened to sin, cos and tan.

To calculate them:

Divide the length of one side by another side
... but which sides?

For a triangle with an angle θ, they are calculated this way:

Sine Function:
sin(θ) = Opposite / Hypotenuse
Cosine Function:
cos(θ) = Adjacent / Hypotenuse
Tangent Function:
tan(θ) = Opposite / Adjacent
In picture form:





Example: What is the sine of 35°?

Answer 2

i got b guys

Answer 3

i got b guys