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 two billion thirty-one million six hundred forty-two thousand eight hundred fifty-two

Interesting facts

  • 2031642852 has 64 divisors, whose sum is 6295138560
  • The reverse of 2031642852 is 2582461302
  • Previous prime number is 73

Basic properties

  • Is Prime? no
  • Number parity even
  • Number length 10
  • Sum of Digits 33
  • Digital Root 6

Name

Name one billion six hundred eighteen million seven hundred ninety-six thousand three hundred sixty-nine

Interesting facts

  • 1618796369 has 4 divisors, whose sum is 1621420644
  • The reverse of 1618796369 is 9636978161
  • Previous prime number is 617

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 10
  • Sum of Digits 56
  • Digital Root 2

Name

Name two hundred forty-eight million one hundred thirty-six thousand seven hundred one

Interesting facts

  • 248136701 has 4 divisors, whose sum is 249507804
  • The reverse of 248136701 is 107631842
  • Previous prime number is 181

Basic properties

  • Is Prime? no
  • Number parity odd
  • Number length 9
  • Sum of Digits 32
  • Digital Root 5