# Expand Using Sum/Difference Formulas sin(pi/2)

Expand Using Sum/Difference Formulas sin(pi/2)
The angle is an angle where the values of the six trigonometric functions are known. Because this is the case, add to keep the value the same.
Use the sum 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 by .
Multiply by .
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### Name

Name two billion eighty-nine million seven hundred ninety-five thousand nine hundred thirty-five

### Interesting facts

• 2089795935 has 16 divisors, whose sum is 3346662240
• The reverse of 2089795935 is 5395979802
• Previous prime number is 1129

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 57
• Digital Root 3

### Name

Name one billion one hundred forty-nine million one hundred thirty-two thousand fifteen

### Interesting facts

• 1149132015 has 32 divisors, whose sum is 2905460736
• The reverse of 1149132015 is 5102319411
• Previous prime number is 3

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 27
• Digital Root 9

### Name

Name one billion six hundred eighty-eight million six hundred sixty-nine thousand sixty-six

### Interesting facts

• 1688669066 has 16 divisors, whose sum is 2588006400
• The reverse of 1688669066 is 6609668861
• Previous prime number is 811

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 56
• Digital Root 2