Find the Exact Value arccos(cos((4pi)/3))

Find the Exact Value arccos(cos((4pi)/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 third quadrant.
The exact value of is .
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 eleven million five hundred seven thousand four hundred eighty-six

Interesting facts

  • 211507486 has 8 divisors, whose sum is 317323800
  • The reverse of 211507486 is 684705112
  • Previous prime number is 12157

Basic properties

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

Name

Name seven hundred twelve million eight hundred fifty-three thousand two hundred fifty-eight

Interesting facts

  • 712853258 has 16 divisors, whose sum is 1152072936
  • The reverse of 712853258 is 852358217
  • Previous prime number is 2693

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 9
  • Sum of Digits 41
  • Digital Root 5

Name

Name one billion nine hundred fifty-four million nine hundred seventy-two thousand six hundred fourteen

Interesting facts

  • 1954972614 has 16 divisors, whose sum is 3137466816
  • The reverse of 1954972614 is 4162794591
  • Previous prime number is 47

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 10
  • Sum of Digits 48
  • Digital Root 3