# Find the Reference Angle sin(-330 degrees )

Find the Reference Angle sin(-330 degrees )
Rewrite as an angle where the values of the six trigonometric functions are known divided by .
Apply the sine half-angle identity.
Change the to because sine is positive in the first quadrant.
Simplify .
Add full rotations of ° until the angle is between ° and °.
The exact value of is .
Write as a fraction with a common denominator.
Combine the numerators over the common denominator.
Subtract from .
Multiply the numerator by the reciprocal of the denominator.
Multiply .
Multiply and .
Multiply by .
Rewrite as .
Any root of is .
Simplify the denominator.
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
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### Name

Name one billion six hundred fifty-nine million forty-one thousand two hundred ninety-two

### Interesting facts

• 1659041292 has 32 divisors, whose sum is 4982572800
• The reverse of 1659041292 is 2921409561
• Previous prime number is 919

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 39
• Digital Root 3

### Name

Name one billion six hundred sixty-eight million seventy-two thousand seven hundred twenty-six

### Interesting facts

• 1668072726 has 16 divisors, whose sum is 2792375280
• The reverse of 1668072726 is 6272708661
• Previous prime number is 227

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 45
• Digital Root 9

### Name

Name one billion five hundred fifty-four million eight hundred sixty-three thousand ninety-two

### Interesting facts

• 1554863092 has 8 divisors, whose sum is 3498441966
• The reverse of 1554863092 is 2903684551
• Previous prime number is 2

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 43
• Digital Root 7