# Expand tan(2x)

Expand tan(2x)
Apply the tangent double-angle identity.
Simplify the denominator.
Rewrite as .
Since both terms are perfect squares, factor using the difference of squares formula, where and .
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### Name

Name eight hundred seven million nine hundred two thousand nine hundred eighteen

### Interesting facts

• 807902918 has 8 divisors, whose sum is 1244607312
• The reverse of 807902918 is 819209708
• Previous prime number is 37

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 44
• Digital Root 8

### Name

Name seven hundred ninety-nine million nine hundred fifty-five thousand nine hundred seventy-six

### Interesting facts

• 799955976 has 64 divisors, whose sum is 3605435712
• The reverse of 799955976 is 679559997
• Previous prime number is 647

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 66
• Digital Root 3

### Name

Name eight hundred ninety-nine million five hundred seventy-nine thousand six hundred seventy-five

### Interesting facts

• 899579675 has 8 divisors, whose sum is 942395376
• The reverse of 899579675 is 576975998
• Previous prime number is 137

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 65
• Digital Root 2