Find the Exact Value cos((2pi)/3)

Find the Exact Value cos((2pi)/3)
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the second quadrant.
The exact value of is .
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
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Name

Name two hundred forty-two million nine hundred sixty-five thousand six hundred

Interesting facts

  • 242965600 has 256 divisors, whose sum is 1924186752
  • The reverse of 242965600 is 006569242
  • Previous prime number is 2425

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 9
  • Sum of Digits 34
  • Digital Root 7

Name

Name one billion seven hundred nine million five hundred forty-five thousand five hundred forty-five

Interesting facts

  • 1709545545 has 16 divisors, whose sum is 3647030592
  • The reverse of 1709545545 is 5455459071
  • Previous prime number is 3

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 45
  • Digital Root 9

Name

Name two hundred twenty-three million five hundred seventy thousand four hundred eight

Interesting facts

  • 223570408 has 32 divisors, whose sum is 756280800
  • The reverse of 223570408 is 804075322
  • Previous prime number is 439

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 9
  • Sum of Digits 31
  • Digital Root 4