# Expand Using Sum/Difference Formulas sin(15 degrees )

Expand Using Sum/Difference Formulas sin(15 degrees )
First, split the angle into two angles where the values of the six trigonometric functions are known. In this case, can be split into .
Use the difference formula for sine to simplify the expression. The formula states that .
The exact value of is .
The exact value of is .
The exact value of is .
The exact value of is .
Simplify each term.
Multiply .
Multiply and .
Combine using the product rule for radicals.
Multiply by .
Multiply by .
Multiply .
Multiply and .
Multiply by .
Combine the numerators over the common denominator.
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
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### Name

Name one billion nine hundred sixty-five million seven hundred thirty-eight thousand nine hundred five

### Interesting facts

• 1965738905 has 16 divisors, whose sum is 2542050000
• The reverse of 1965738905 is 5098375691
• Previous prime number is 18749

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 53
• Digital Root 8

### Name

Name five hundred twenty-five million eleven thousand nine hundred forty-five

### Interesting facts

• 525011945 has 8 divisors, whose sum is 630139200
• The reverse of 525011945 is 549110525
• Previous prime number is 8599

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 32
• Digital Root 5

### Name

Name one billion three hundred ninety-three million five hundred forty-six thousand four hundred ninety-six

### Interesting facts

• 1393546496 has 512 divisors, whose sum is 35715079062
• The reverse of 1393546496 is 6946453931
• Previous prime number is 2

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 50
• Digital Root 5