# Find the Cosine of the Angle -(5pi)/6

Find the Cosine of the Angle -(5pi)/6
Take the cosine of .
Add full rotations of until the angle is greater than or equal to and less than .
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 nine hundred twenty-four million two hundred eighty-seven thousand three hundred seventy-five

### Interesting facts

• 924287375 has 32 divisors, whose sum is 1742368320
• The reverse of 924287375 is 573782429
• Previous prime number is 5

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 47
• Digital Root 2

### Name

Name three hundred eighty-nine million two hundred eighty-two thousand three

### Interesting facts

• 389282003 has 8 divisors, whose sum is 435029616
• The reverse of 389282003 is 300282983
• Previous prime number is 41

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 35
• Digital Root 8

### Name

Name eight hundred sixty-three million seven hundred fifty-five thousand three hundred eighty-nine

### Interesting facts

• 863755389 has 32 divisors, whose sum is 1264688640
• The reverse of 863755389 is 983557368
• Previous prime number is 113

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 54
• Digital Root 9