# Expand Using Sum/Difference Formulas tan(u+pi)

Expand Using Sum/Difference Formulas tan(u+pi)
Use the sum formula for tangent to simplify the expression. The formula states that .
Simplify the numerator.
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because tangent is negative in the second quadrant.
The exact value of is .
Multiply by .
Simplify the denominator.
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because tangent is negative in the second quadrant.
The exact value of is .
Multiply by .
Multiply .
Multiply by .
Multiply by .
Divide by .
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### Name

Name one billion six hundred nineteen million three hundred seventy-four thousand three hundred thirty-seven

### Interesting facts

• 1619374337 has 16 divisors, whose sum is 1860019200
• The reverse of 1619374337 is 7334739161
• Previous prime number is 467

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 44
• Digital Root 8

### Name

Name five hundred forty-nine million four hundred four thousand one hundred seventy-two

### Interesting facts

• 549404172 has 16 divisors, whose sum is 1237158792
• The reverse of 549404172 is 271404945
• Previous prime number is 1251

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 36
• Digital Root 9

### Name

Name one billion two hundred twenty-two million two hundred forty-nine thousand ninety-nine

### Interesting facts

• 1222249099 has 4 divisors, whose sum is 1222387120
• The reverse of 1222249099 is 9909422221
• Previous prime number is 9511

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 40
• Digital Root 4