# How do you find the value of cos3pi 4?

## How do you find the value of cos3pi 4?

The value of cos 3pi/4 can be calculated by constructing an angle of 3π/4 radians with the x-axis, and then finding the coordinates of the corresponding point (-0.7071, 0.7071) on the unit circle. The value of cos 3pi/4 is equal to the x-coordinate (-0.7071). ∴ cos 3pi/4 = -0.7071.

What is the exact value of cos11pi 12?

-0.9659258
The value of cos 11pi/12 is -0.9659258. . .. Cos 11pi/12 radians in degrees is written as cos ((11π/12) × 180°/π), i.e., cos (165°).

### What quadrant is 11pi 12 in?

Since the arc ((11pi)/12) is located in Quadrant II, only the negative answer is accepted.

What is the exact value of cos 11π 4?

The value of cos 11pi/4 is -0.7071067. . .. Cos 11pi/4 radians in degrees is written as cos ((11π/4) × 180°/π), i.e., cos (495°).

#### How do you find sin3pi 4?

The value of sin 3pi/4 can be calculated by constructing an angle of 3π/4 radians with the x-axis, and then finding the coordinates of the corresponding point (-0.7071, 0.7071) on the unit circle. The value of sin 3pi/4 is equal to the y-coordinate (0.7071). ∴ sin 3pi/4 = 0.7071.

What is the value of cos 45 in trigonometry?

The value of cos 45° is equal to 1/√2.

## How do you find the exact value of sin 13pi 12?

How do you break 11pi 12?

First, split the angle into two angles where the values of the six trigonometric functions are known. In this case, 11π12 11 π 12 can be split into 2π3+π4 2 π 3 + π 4 . Use the sum formula for cosine to simplify the expression.

### How do you find 11pi 12 on the unit circle?

58 second clip suggested5:12Find Exact Value of cos 11 pi by 12 Compound Angle Formula …YouTube

How many degrees is 17pi 12?

255 degrees
To convert from radians in degrees we have to multiply by 180π . ⇒−17π12=−17π12⋅180π=−255 degrees.

#### How do you find 11pi 4 on the unit circle?

55 second clip suggested8:15Find degree measure of 11 pi/4 using the unit circle – YouTubeYouTube