# Question: What Is COS Equal To?

## What is COS 30 in SURD form?

The surd form of trigonometrical ratios:Trigonometrical ratio:Surd form:Approximationcos 30oroot 3 / 20.866cos 451 / root 20.7071cos 60o1 / 20.5tan 30o1 / root 30.57745 more rows.

## What does SOH CAH TOA mean?

sine equals opposite over hypotenuse”SOHCAHTOA” is a helpful mnemonic for remembering the definitions of the trigonometric functions sine, cosine, and tangent i.e., sine equals opposite over hypotenuse, cosine equals adjacent over hypotenuse, and tangent equals opposite over adjacent, (1)

## What does Cos stand for?

COSAcronymDefinitionCOSChief of StaffCOSChamber of Secrets (book by J.K. Rowling)COSCommercial off the ShelfCOSCosine (mathematics)161 more rows

## What is the COS formula?

In any right triangle, the cosine of an angle is the length of the adjacent side (A) divided by the length of the hypotenuse (H). In a formula, it is written simply as ‘cos’. Often remembered as “CAH” – meaning Cosine is Adjacent over Hypotenuse. See SOH CAH TOA.

## What is the exact value of cos?

Trigonometry Examples The exact value of cos(30) is √32 .

## How do you go from sin to cos?

The Basic Two: Sine and Cosine(1) Memorize: sine = (opposite side) / hypotenuse. … (2) sin A = cos(90° − A) or cos(π/2 − A) cos A = sin(90° − A) or sin(π/2 − A)(3) Memorize: … (4) tangent = (opposite side) / (adjacent side)(5) Memorize: … (6) tan A = cot(90° − A) or cot(π/2 − A) … (7) sec A = csc(90° − A) or csc(π/2 − A)

## How do you convert COS to degrees?

You can convert radians into degrees by multiplying it with 180/Math. PI , Furthermore the inverse cosine (or cos^-1 like some textbooks denote this) is the Math. acos method ( a standing for arc ). double AB = 125; double AC = 150; double angleA = Math.

## What is the exact value of cos (- 60?

1/2Answer and Explanation: The angle with measure 60° is one of those angles that has a well-known cosine value: cos(60°) = 1/2.

## What are the basics of trigonometry?

Trigonometry, the branch of mathematics concerned with specific functions of angles and their application to calculations. There are six functions of an angle commonly used in trigonometry. Their names and abbreviations are sine (sin), cosine (cos), tangent (tan), cotangent (cot), secant (sec), and cosecant (csc).

## What is cos function?

The cosine function is a periodic function which is very important in trigonometry. The simplest way to understand the cosine function is to use the unit circle. … The x -coordinate of the point where the other side of the angle intersects the circle is cos(θ) , and the y -coordinate is sin(θ) .

## Which is the COS 30?

Cos 30° = √3/2 is an irrational number and equals to 0.8660254037 (decimal form). Therefore, the exact value of cos 30 degrees is written as 0.8660 approx. √3/2 is the value of Cos 30° which is a trigonometric ratio or trigonometric function of a particular angle.

## What are the 3 trigonometric functions?

The most widely used trigonometric functions are the sine, the cosine, and the tangent. Their reciprocals are respectively the cosecant, the secant, and the cotangent, which are less used in modern mathematics.

## Why is Tan Sin over COS?

Sin is equal to the side opposite the angle that you are conducting the functions on over the hypotenuse which is the longest side in the triangle. Cos is adjacent over hypotenuse. And tan is opposite over adjacent, which means tan is sin/cos.

## What is cos equivalent to?

Sine, Cosine and TangentSine Function:sin(θ) = Opposite / HypotenuseCosine Function:cos(θ) = Adjacent / HypotenuseTangent Function:tan(θ) = Opposite / Adjacent

## What is cos in math?

more … In a right angled triangle, the cosine of an angle is: The length of the adjacent side divided by the length of the hypotenuse. The abbreviation is cos. cos(θ) = adjacent / hypotenuse.

## What are the six trigonometric functions?

There are six main trigonometric functions:Sine (sin)Cosine (cos)Tangent (tan)Secant (sec)Cosecant (csc)Cotangent (cot)