# Simplify cos((-3pi)/4)

Simplify cos((-3pi)/4)
Move the negative in front of the fraction.
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 three hundred eighteen million eight hundred forty-five thousand eight hundred sixty-five

### Interesting facts

• 318845865 has 16 divisors, whose sum is 378900480
• The reverse of 318845865 is 568548813
• Previous prime number is 29

### Basic properties

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

### Name

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

### Interesting facts

• 1400084548 has 8 divisors, whose sum is 3150190242
• The reverse of 1400084548 is 8454800041
• Previous prime number is 2

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 34
• Digital Root 7

### Name

Name four hundred sixty-six million one hundred twenty-two thousand five hundred seventy-seven

### Interesting facts

• 466122577 has 4 divisors, whose sum is 486388800
• The reverse of 466122577 is 775221664
• Previous prime number is 23

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 40
• Digital Root 4