 # Question: What Is The Value For Sin 30?

## What is an exact value?

Definition.

Exact value is where you cannot estimate the value you must be precise, eg; you can’t estimate something as being around about 5 centimetres; no you need an exact value such as 5.62..

## What is the value for sin 45?

0.7071067812The value of Sin 45 degree in decimal form is 0.7071067812. Sine is considered as one of the most important functions in trigonometry as it is used to find out the unknown values of the angles and length of the sides of a right-angle triangle.

## Is the value of sin 180 degree?

θsin θcos θ90°10180°0−1270°−10360°011 more row

## Why Sine is called sine?

The word “sine” (Latin “sinus”) comes from a Latin mistranslation by Robert of Chester of the Arabic jiba, which is a transliteration of the Sanskrit word for half the chord, jya-ardha.

## Why is tan 90 undefined?

At 90 degrees we must say that the tangent is undefined (und), because when you divide the leg opposite by the leg adjacent you cannot divide by zero. In the third quadrant the hypotenuse extended will now meet the tangent line above the x-axis and is now positive again.

## What is the value of Sin Cos Tan?

Example: what are the sine, cosine and tangent of 30° ?Sinesin(30°) = 1 / 2 = 0.5Cosinecos(30°) = 1.732 / 2 = 0.866…Tangenttan(30°) = 1 / 1.732 = 0.577…

## Why is sin 30 the same as SIN 150?

it’s because the reference angle for 150 is equal to 30. that reference angle is the angle within the triangle formed from dropping a perpendicular to the x-axis of the unit circle. … the internal angle of the triangle in quadrant 2 is equal to 180 – 150 which is equal to 30 degrees. that is called the reference angle.

## What is sin 150 value?

First of all, observe that 150=180−30 . the answer comes from the fact that cos(30)=√32 and sin(30)=12 are known values.

## What does cos0 mean?

In terms of the right triangles used to define trigonometric functions, cos(x)=adjacent sidehypotenuse . When x=0 , adjacent side length=hypotenuse length . Therefore, cos(0)=1 .

## What are the exact trig values?

Exact trigonometric ratios for 0°, 30°, 45°, 60° and 90°The trigonometric ratios for the angles 30°, 45° and 60° can be found using two special triangles.An equilateral triangle with side lengths of 2 cm can be used to find exact values for the trigonometric ratios of 30° and 60°.More items…

## What are the values of sin?

The function f(x) = sin x has all real numbers in its domain, but its range is −1 ≤ sin x ≤ 1. The values of the sine function are different, depending on whether the angle is in degrees or radians. The function is periodic with periodicity 360 degrees or 2π radians.

## What is the value tan 30?

The value of tan 30 degrees is 1/√3. … In trigonometry, the tangent of an angle in a right-angled triangle is equal to the ratio of opposite side and the adjacent side of the angle. Tan 30 degrees is also represented by tan π/6 in terms of radians. The exact value of tan 30° is 0.57735.

## What is sin180?

We know that the exact value of sin 0 degree is 0. So, Sin 180 degree is +(sin 0) which is equal to +(0) Therefore, the value of sin 180 degrees = 0. The value of sin pi can be derived from some other trigonometric angles and functions like sine and cosine functions from the trigonometry table.

## What is value of sin 120 degree?

By using the value of cosine function relations, we can easily find the value of sin 120 degrees. Using the trigonometry formula, sin (90 + a) = cos a, we can find the sin 120 value. We know that the value of cos 30 degrees is √3/2. Therefore, sin 120° = √3/2.

## What is the exact value of sin 15?

An exact value for sin15∘… Add to your resource collection We will use the identity sin(x−y)=sinxcosy−sinycosx. We have that sin15∘=sin(45−30)∘=sin45∘cos30∘−cos45∘sin30∘=1√2√32−1√212=√2√32×2−√22×2=√6−√24. and so, since cosθ is positive between 0∘ and 90∘, cos15∘=√6+√24.