## How do you find the reference angle of 765 degrees?

Subtract 360° 360 ° from 765° 765 ° . The resulting angle of 405° 405 ° is positive and coterminal with 765° 765 ° but isn’t less than 360° 360 ° .

**What is the reference angle of sin 405?**

The value of sin 405° is equal to the y-coordinate (0.7071). ∴ sin 405° = 0.7071.

**What is the reference angle of sin 240?**

Explanation: For sin 240 degrees, the angle 240° lies between 180° and 270° (Third Quadrant). Since sine function is negative in the third quadrant, thus sin 240° value = -(√3/2) or -0.8660254. . .

### What is the value of cot 570 degree?

√3

Cot 570 degrees is the value of cotangent trigonometric function for an angle equal to 570 degrees. The value of cot 570° is √3 or 1.7321 (approx).

**How do I find the reference angle?**

So, if our given angle is 110°, then its reference angle is 180° – 110° = 70°. When the terminal side is in the third quadrant (angles from 180° to 270°), our reference angle is our given angle minus 180°. So, if our given angle is 214°, then its reference angle is 214° – 180° = 34°.

**What is the reference angle of 1200?**

Therefore, the reference angle of -1200° is 60°.

#### How do you find cot 390?

To find the value of cot 390 degrees using the unit circle, represent 390° in the form (1 × 360°) + 30° [∵ 390°>360°] ∵ The angle 390° is coterminal to 30° angle and also cotangent is a periodic function, cot 390° = cot 30°.

**How do you find the value of sin 40?**

The value of sin 40° is equal to the y-coordinate (0.6428). ∴ sin 40° = 0.6428.

**How do you find sin 270 without a calculator?**

The value of sin 270 degrees can be calculated by constructing an angle of 270° with the x-axis, and then finding the coordinates of the corresponding point (0, -1) on the unit circle. The value of sin 270° is equal to the y-coordinate (-1). ∴ sin 270° = -1.

## What is the reference angle for a 240 angle?

60°

Reference angle for 240°: 60° (π / 3)

**How do you calculate tan 390?**

Tan 390 degrees is the value of tangent trigonometric function for an angle equal to 390 degrees. The value of tan 390° is 1/√3 or 0.5774 (approx).

**How do you solve tan 315?**

The tan of 315 degrees equals the y-coordinate(-0.7071) divided by x-coordinate(0.7071) of the point of intersection (0.7071, -0.7071) of unit circle and r.