Expand tan(2x)

Expand tan(2x)
Apply the tangent double-angle identity.
Simplify the denominator.
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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