# Verify the Identity sin(A+B)=cos(pi/2-(A+B))

Verify the Identity sin(A+B)=cos(pi/2-(A+B))
Start on the right side.
Apply the difference of angles identity .
Simplify the expression.
Simplify each term.
The exact value of is .
Multiply by .
The exact value of is .
Multiply by .
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 hundred fifty-five million six hundred fifty-two thousand one hundred seventy-four

### Interesting facts

• 155652174 has 8 divisors, whose sum is 234082728
• The reverse of 155652174 is 471256551
• Previous prime number is 387

### Basic properties

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

### Name

Name one billion two hundred fifty-seven million four hundred ninety-five thousand seven hundred thirty

### Interesting facts

• 1257495730 has 8 divisors, whose sum is 2263492332
• The reverse of 1257495730 is 0375947521
• Previous prime number is 5

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 43
• Digital Root 7

### Name

Name one billion nine hundred fifty-four million two hundred sixty-one thousand six hundred sixty-six

### Interesting facts

• 1954261666 has 16 divisors, whose sum is 3359825856
• The reverse of 1954261666 is 6661624591
• Previous prime number is 347

### Basic properties

• Is Prime? no
• Number parity even
• Number length 10
• Sum of Digits 46
• Digital Root 1