Verify the Identity sec(x)-sec(x)sin(x)^2=cos(x)

Verify the Identity sec(x)-sec(x)sin(x)^2=cos(x)
Start on the left side.
Apply Pythagorean identity.
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Multiply by .
Factor out of .
Factor out of .
Rewrite as .
Apply pythagorean identity.
Apply the reciprocal identity to .
Cancel the common factor of .
Because the two sides have been shown to be equivalent, the equation is an identity.
is an identity
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Name

Name one billion eighty-nine million three hundred ninety thousand three hundred forty-nine

Interesting facts

  • 1089390349 has 4 divisors, whose sum is 1101630780
  • The reverse of 1089390349 is 9430939801
  • Previous prime number is 89

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 46
  • Digital Root 1

Name

Name six hundred thirty-eight million nine hundred fifty-eight thousand four hundred forty-one

Interesting facts

  • 638958441 has 4 divisors, whose sum is 658320852
  • The reverse of 638958441 is 144859836
  • Previous prime number is 33

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 9
  • Sum of Digits 48
  • Digital Root 3

Name

Name one billion three hundred ninety-four million three hundred thirty-eight thousand three hundred thirty-nine

Interesting facts

  • 1394338339 has 8 divisors, whose sum is 1427402240
  • The reverse of 1394338339 is 9338334931
  • Previous prime number is 2767

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 46
  • Digital Root 1