## What angle is Coterminal with 19pi 4?

Subtract 2π 2 π from 19π4 19 π 4 . The resulting angle of 11π4 11 π 4 is positive, less than 2π 2 π , and coterminal with 19π4 19 π 4 .

What is the value of sin 19 PI by 4?

√22
The exact value of sin(π4) sin ( π 4 ) is √22 .

### How do you find the exact value of sec 19pi 6?

Make the expression negative because secant is negative in the third quadrant. The exact value of sec(π6) sec ( π 6 ) is 2√3 . Multiply 2√3 by √3√3 .

What is the value of cos 19 PI by 4?

The exact value of cos(π4) cos ( π 4 ) is √22 .

## What is the reference angle of 19pi 3?

Since π3 is in the first quadrant, the reference angle is π3 .

How do you find the exact value of tan15?

Value of Tan 15

1. Tan (15°) can be found if we know the value of sin 15 degrees and cos 15 degrees.
2. From the above table, we have the values of tan, sin and cos ratios for 0°, 30°, 45°, 60° and 90°.
3. tan (15°) = √3 – 1/ √3 + 1.
4. Hence, the value of tan (15°) is √3 – 1/√3 + 1.
5. ∴ Tan (15°) = (1.732 – 1)/(1.732 + 1) = 0.2679.

### What is the reference angle for 19pi 5?

Find an angle that is positive, less than 2π , and coterminal with 19π5 19 π 5 . Subtract 2π 2 π from 19π5 19 π 5 . The resulting angle of 9π5 9 π 5 is positive, less than 2π 2 π , and coterminal with 19π5 19 π 5 . Since the angle 9π5 9 π 5 is in the fourth quadrant, subtract 9π5 9 π 5 from 2π .

What angle is Coterminal with 19pi 6?

Trigonometry Examples Find an angle that is positive, less than 2π , and coterminal with 19π6 19 π 6 . Subtract 2π 2 π from 19π6 19 π 6 . The resulting angle of 7π6 7 π 6 is positive, less than 2π 2 π , and coterminal with 19π6 19 π 6 .

## What is 19pi 6 on the unit circle?

Thus, cos(19π6)=cos(7π6) .

What is the value of cos 15 )?

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