Find the Exact Value cos(-(11pi)/4)

Find the Exact Value cos(-(11pi)/4)
Add full rotations of until the angle is between and .
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 result can be shown in multiple forms.
Exact Form:
Decimal Form:
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Name

Name four hundred ninety-two million three hundred twenty-one thousand seven hundred forty-five

Interesting facts

  • 492321745 has 16 divisors, whose sum is 598585680
  • The reverse of 492321745 is 547123294
  • Previous prime number is 853

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 9
  • Sum of Digits 37
  • Digital Root 1

Name

Name one billion six hundred three million five hundred forty-two thousand ninety-eight

Interesting facts

  • 1603542098 has 8 divisors, whose sum is 2405504640
  • The reverse of 1603542098 is 8902453061
  • Previous prime number is 17191

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 10
  • Sum of Digits 38
  • Digital Root 2

Name

Name one billion eight hundred eighty-one million eight hundred eight thousand four hundred eighty-one

Interesting facts

  • 1881808481 has 8 divisors, whose sum is 2187090240
  • The reverse of 1881808481 is 1848081881
  • Previous prime number is 59

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 47
  • Digital Root 2