HELP GEOMETRY ASAP

Question

HELP GEOMETRY  ASAP

hac138 · Answer

attachment

hac138 · Answer

ignore the answer. its wrong

lord_box · Answer

What's the formula for cosine?

hac138 · Answer

sin,cost,tan

hac138 · Answer

cos

lord_box · Answer

The formula? What method is used to calculate the value of cosine?

hac138 · Answer

i dont know i just need the answer

lord_box · Answer

I can't "just" give you the answer. The trig functions are ratios of sides of a triangle. Which ratio of sides will give you cosine?

hac138 · Answer

THE 30°-60°-90° TRIANGLE

hac138 · Answer

@Lord_Box

hac138 · Answer

ANSWER AND ILL REWARD MEDAL

lord_box · Answer

Sine = Opposite / Hypotenuse
Cosine = Adjacent / Hypotenuse
Tangent = Opposite / Adjacent
Secant* = 1 / Cosine

hac138 · Answer

@Lord_Box  SO THE COSINE ASNWER IS 1

lord_box · Answer

Uhm, no. Look at the picture you've sent. Find the side (other than the hypotenuse) that's adjacent to the angle, then find the hypotenuse. Divide the adjacent by the hypotenuse to find cosine.

hac138 · Answer

@Lord_Box help me out homie. i just need the answer

lord_box · Answer

You would get the answer if you looked at the picture and divided two numbers.

hac138 · Answer

divided them by what and what do i need to divide

lord_box · Answer

Look at angle x. Next to it is the hypotenuse (the longest side of the triangle) and another side, which we will call adjacent. Divide the adjacent side by the hypotenuse to get cos(x).

jim_thompson5910 · Answer

Similar example:

Let's say we have a triangle with sides 3,4, and 5. 

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jim_thompson5910 · Answer

if the reference angle is at angle A, then we can apply these labels

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jim_thompson5910 · Answer

So...
$$\Large \cos(\text{angle}) = \frac{\text{adjacent}}{\text{hypotenuse}}$$

$$\Large \cos(A) = \frac{4}{5}$$

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