# Expand Using Sum/Difference Formulas cos(60 degrees -45 degrees )

Expand Using Sum/Difference Formulas cos(60 degrees -45 degrees )
Use the difference formula for cosine to simplify the expression. The formula states that .
Remove parentheses.
Simplify each term.
The exact value of is .
The exact value of is .
Multiply .
Multiply and .
Multiply by .
The exact value of is .
The exact value of is .
Multiply .
Multiply and .
Combine using the product rule for radicals.
Multiply by .
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 four hundred twenty-three million nine hundred seventy-two thousand six hundred ninety-eight

### Interesting facts

• 423972698 has 4 divisors, whose sum is 635959050
• The reverse of 423972698 is 896279324
• Previous prime number is 2

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 50
• Digital Root 5

### Name

Name one billion nine hundred fifty million five hundred twelve thousand seven hundred fifty-two

### Interesting facts

• 1950512752 has 64 divisors, whose sum is 9876754440
• The reverse of 1950512752 is 2572150591
• Previous prime number is 5333

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 37
• Digital Root 1

### Name

Name one billion five hundred sixty-one million sixty-seven thousand four hundred sixty-nine

### Interesting facts

• 1561067469 has 4 divisors, whose sum is 1574410044
• The reverse of 1561067469 is 9647601651
• Previous prime number is 117

### Basic properties

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