# What is the formula of sin 72 degree?

## What is the formula of sin 72 degree?

Sin 72 degrees is the value of sine trigonometric function for an angle equal to 72 degrees. The value of sin 72° is √(10 – 2√5)/2 or 0.9511 (approx).

### How do you find the value of tan 72?

The value of tan 72 degrees in decimal is 3.077683537. . .. Tan 72 degrees can also be expressed using the equivalent of the given angle (72 degrees) in radians (1.25663 . . .) ⇒ 72 degrees = 72° × (π/180°) rad = 2π/5 or 1.2566 . . . ∴ tan 72° = tan(1.2566) = √(5 + 2√5) or 3.0776835. . .

What is the exact value of cos 72?

0.309
The value of cos 72 degrees can be calculated by constructing an angle of 72° with the x-axis, and then finding the coordinates of the corresponding point (0.309, 0.9511) on the unit circle. The value of cos 72° is equal to the x-coordinate (0.309). ∴ cos 72° = 0.309.

What is the radian measure of the angle 70?

Therefore, the conversion of 70 degree into a radian measure is 1.22 radians.

## How do you find the value of sin 73?

How to Find the Value of Sin 73 Degrees? The value of sin 73 degrees can be calculated by constructing an angle of 73° with the x-axis, and then finding the coordinates of the corresponding point (0.2924, 0.9563) on the unit circle. The value of sin 73° is equal to the y-coordinate (0.9563). ∴ sin 73° = 0.9563.

### What is the value of tan 70?

2.7475
Tan 70 degrees is the value of tangent trigonometric function for an angle equal to 70 degrees. The value of tan 70° is 2.7475 (approx).

What is the value of tan 74?

If the angle is 74, then the tan of 74 degrees will be 3.487.

What is sin 72 in terms of COS?

sinθ = cos(90° – θ) So, sin72° = cos18°

## What is an angle of 70 in radians and revolutions?

How do you find sin 74?

Answer. The sin of 74 degrees is 0.96126, the same as sin of 74 degrees in radians. To obtain 74 degrees in radian multiply 74° by π / 180° = 37/90 π. Sin 74degrees = sin (37/90 × π).

How do you use trigonometric functions?

To use trigonometric functions, we first must understand how to measure the angles. Although we can use both radians and degrees, radians are a more natural measurement because they are related directly to the unit circle, a circle with radius 1. The radian measure of an angle is defined as follows.

## How do you find the radian measure of a 360 degree angle?

Figure 1.4.1: The radian measure of an angle θ is the arc length s of the associated arc on the unit circle. Since an angle of 360° corresponds to the circumference of a circle, or an arc of length 2π, we conclude that an angle with a degree measure of 360° has a radian measure of 2π. Similarly, we see that 180° is equivalent to π radians.

### What is a trigonometric identity?

A trigonometric identity is an equation involving trigonometric functions that is true for all angles θ for which the functions are defined. We can use the identities to help us solve or simplify equations.

How do you find the trigonometric function if x = 0?

Let P = (x, y) be a point on the unit circle centered at the origin O. Let θ be an angle with an initial side along the positive x -axis and a terminal side given by the line segment OP. The trigonometric functions are then defined as If x = 0, secθ and tanθ are undefined. If y = 0, then cotθ and cscθ are undefined.