# Find the Exact Value cos((2pi)/3)

Find the Exact Value cos((2pi)/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 second 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 seventy million two hundred thirty thousand eight hundred eighty-one

### Interesting facts

• 970230881 has 4 divisors, whose sum is 970485012
• The reverse of 970230881 is 188032079
• Previous prime number is 3877

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 38
• Digital Root 2

### Name

Name one billion nine hundred thirty million five hundred sixty-one thousand four hundred twenty

### Interesting facts

• 1930561420 has 16 divisors, whose sum is 4358490480
• The reverse of 1930561420 is 0241650391
• Previous prime number is 295

### Basic properties

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

### Name

Name nine hundred forty-nine million four hundred thirty-two thousand five hundred eighty-four

### Interesting facts

• 949432584 has 64 divisors, whose sum is 4274034336
• The reverse of 949432584 is 485234949
• Previous prime number is 11153

### Basic properties

• Is Prime? no
• Number parity even
• Number length 9
• Sum of Digits 48
• Digital Root 3