# Expand Using Sum/Difference Formulas sin((3pi)/2+x)

Expand Using Sum/Difference Formulas sin((3pi)/2+x)
Use the sum formula for sine to simplify the expression. The formula states that .
Remove parentheses.
Simplify each term.
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the fourth quadrant.
The exact value of is .
Multiply by .
Rewrite as .
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.
The exact value of is .
Multiply by .
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### Name

Name one billion six hundred eighty million two hundred sixty thousand one hundred fifty-one

### Interesting facts

• 1680260151 has 8 divisors, whose sum is 2246767600
• The reverse of 1680260151 is 1510620861
• Previous prime number is 349

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 30
• Digital Root 3

### Name

Name seven hundred twenty-eight million four hundred sixty-five thousand eight hundred twenty

### Interesting facts

• 728465820 has 32 divisors, whose sum is 2622477168
• The reverse of 728465820 is 028564827
• Previous prime number is 5

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 42
• Digital Root 6

### Name

Name seven hundred thirty-five million eight hundred thirty-six thousand seven hundred twenty-five

### Interesting facts

• 735836725 has 16 divisors, whose sum is 1141113456
• The reverse of 735836725 is 527638537
• Previous prime number is 13

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 46
• Digital Root 1