# Verify the Identity ((1+cos(A))(1-cos(A)))/(sin(A))=sin(A)

Verify the Identity ((1+cos(A))(1-cos(A)))/(sin(A))=sin(A)
Start on the left side.
Apply the distributive property.
Simplify.
Simplify each term.
Multiply by .
Apply the distributive property.
Multiply by .
Multiply .
Raise to the power of .
Raise to the power of .
Use the power rule to combine exponents.
Subtract from .
Apply pythagorean identity.
Cancel the common factor of and .
Because the two sides have been shown to be equivalent, the equation is an identity.
is an identity
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### Name

Name one billion seventy-four million eight hundred ten thousand eight hundred twenty-two

### Interesting facts

• 1074810822 has 32 divisors, whose sum is 2278098432
• The reverse of 1074810822 is 2280184701
• Previous prime number is 1303

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 33
• Digital Root 6

### Name

Name one billion three hundred ninety-one million three hundred fifty-five thousand three hundred thirty-three

### Interesting facts

• 1391355333 has 8 divisors, whose sum is 2061267200
• The reverse of 1391355333 is 3335531931
• Previous prime number is 9

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 36
• Digital Root 9

### Name

Name one billion seventy-four million nine hundred seventy-seven thousand nine hundred eighteen

### Interesting facts

• 1074977918 has 8 divisors, whose sum is 1842819312
• The reverse of 1074977918 is 8197794701
• Previous prime number is 7

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 53
• Digital Root 8