# Find the Reference Angle cot(-pi/6)

Find the Reference Angle cot(-pi/6)
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 cotangent is negative in the fourth 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 fifty-seven million one hundred fifty-six thousand three hundred twelve

### Interesting facts

• 2057156312 has 32 divisors, whose sum is 6948194040
• The reverse of 2057156312 is 2136517502
• Previous prime number is 1321

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 32
• Digital Root 5

### Name

Name one billion seventy-nine million eight hundred eighty-four thousand six hundred ten

### Interesting facts

• 1079884610 has 16 divisors, whose sum is 2221477056
• The reverse of 1079884610 is 0164889701
• Previous prime number is 7

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 44
• Digital Root 8

### Name

Name one billion two hundred seventy-two million one hundred fifty-eight thousand three hundred two

### Interesting facts

• 1272158302 has 8 divisors, whose sum is 1921966200
• The reverse of 1272158302 is 2038512721
• Previous prime number is 139

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 31
• Digital Root 4