Solve for u cos(2u)^2-sin(2u)^2=cos(4u)

Solve for u cos(2u)^2-sin(2u)^2=cos(4u)
Move to the left side of the equation by subtracting it from both sides.
Simplify the left side.
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Apply the cosine double-angle identity.
Multiply by .
Subtract from .
Since , the equation will always be true for any value of .
All real numbers
The result can be shown in multiple forms.
All real numbers
Interval Notation:
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Name

Name two hundred thirty-nine million seven hundred fifty-eight thousand seven hundred fifty-three

Interesting facts

  • 239758753 has 8 divisors, whose sum is 258362496
  • The reverse of 239758753 is 357857932
  • Previous prime number is 1931

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 9
  • Sum of Digits 49
  • Digital Root 4

Name

Name seventy-one million one hundred thirty-one thousand eighty-eight

Interesting facts

  • 71131088 has 128 divisors, whose sum is 412672320
  • The reverse of 71131088 is 88013117
  • Previous prime number is 1219

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 8
  • Sum of Digits 29
  • Digital Root 2

Name

Name eight hundred ninety-six million fourteen thousand five hundred fifty-seven

Interesting facts

  • 896014557 has 8 divisors, whose sum is 1592914784
  • The reverse of 896014557 is 755410698
  • Previous prime number is 3

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 9
  • Sum of Digits 45
  • Digital Root 9