# Simplify sin(pi)+cos(pi)

Simplify sin(pi)+cos(pi)
Simplify each term.
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.
The exact value of is .
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 .
Multiply by .
Subtract from .
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### Name

Name one billion three hundred sixteen million one hundred forty-seven thousand three hundred fifty-eight

### Interesting facts

• 1316147358 has 16 divisors, whose sum is 2633976576
• The reverse of 1316147358 is 8537416131
• Previous prime number is 1583

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 39
• Digital Root 3

### Name

Name one billion six hundred sixteen million thirty-nine thousand three hundred sixty-nine

### Interesting facts

• 1616039369 has 8 divisors, whose sum is 1854631680
• The reverse of 1616039369 is 9639306161
• Previous prime number is 239

### Basic properties

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

### Name

Name one billion six hundred forty-eight million three hundred forty thousand five hundred twenty-nine

### Interesting facts

• 1648340529 has 8 divisors, whose sum is 1852680672
• The reverse of 1648340529 is 9250438461
• Previous prime number is 11

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 42
• Digital Root 6