Table of Contents

## What is the exact value of sin 20?

0.342

Sin 20 degrees is the value of sine trigonometric function for an angle equal to 20 degrees. The value of sin 20° is 0.342 (approx).

**What is the exact value of cos 25?**

0.9063

The value of cos 25° is equal to the x-coordinate (0.9063). ∴ cos 25° = 0.9063.

**What is the exact value of cos degrees?**

Therefore, the exact value of cos 30 degrees is written as 0.8660 approx.

### How do you find the value of cos 22 degrees?

The value of cos 22° is equal to the x-coordinate (0.9272). ∴ cos 22° = 0.9272.

**How do you solve tan 20 degrees?**

The value of tan 20 degrees is 0.3639702. . …..We can use trigonometric identities to represent tan 20° as,

- cot(90° – 20°) = cot 70°
- -cot(90° + 20°) = -cot 110°
- -tan (180° – 20°) = -tan 160°

**How do you find cos 20 without a calculator?**

The value of cos 20 degrees can be calculated by constructing an angle of 20° with the x-axis, and then finding the coordinates of the corresponding point (0.9397, 0.342) on the unit circle. The value of cos 20° is equal to the x-coordinate (0.9397). ∴ cos 20° = 0.9397.

#### What is the exact value of cos15?

Answer: The value of cos 15° = (√3+1)/2√2.

**What is the value of cos 20 in fraction?**

The value of cos 20 degrees is 0.9396926. . .. Cos 20 degrees in radians is written as cos (20° × π/180°), i.e., cos (π/9) or cos (0.349065. . .).

**What is the cosine of 23?**

0.9205

The value of cos 23° is equal to the x-coordinate (0.9205). ∴ cos 23° = 0.9205.

## How do you find cos 20 degrees?

Draw a right triangle with a 20 degree acute angle and with a hypotenuse of one meter. Then take your meter stick and measure the leg next to the 20 degree angle. You should get a length of 98.9 cm. Dividing that by 100 cm which is the hypotenuse, you will get 0.989 approximately, which is = cos 20 deg. (approximately).

**What is the cosine of a 90 degree angle?**

In the illustration below, cos (α) = b/c and cos (β) = a/c. Since cos (α) = b/c, from this definition it follows that the cosine of any angle is always less than or equal to one, and it can take negative values. The cosine of a 90-degree angle is equal to zero, since in order to calculate it we would need a triangle with two 90-degree angles,

**What is the value of Cos 6/20?**

For example, if one needs to find cot (α) and it is known that the adjacent side b = 6 and c = 20, then cos (α) = 6 / 20 = 0.3. The cosine function can be used to model periodic phenomena in physics, biology, social sciences, etc.

### What is the value of cos (α) = B/C?

In the graph above, cos(α) = b/c. From this definition it follows that the cosine of any angle is always less than or equal to one, and it can take negative values. The cosine of a 90-degree angle is equal to zero, since in order to calculate it we would need a triangle with two 90-degree angles,…