# Find the Exact Value tan(arccos(12/13))

Find the Exact Value tan(arccos(12/13))
Draw a triangle in the plane with vertices , , and the origin. Then is the angle between the positive x-axis and the ray beginning at the origin and passing through . Therefore, is .
Multiply the numerator by the reciprocal of the denominator.
One to any power is one.
Apply the product rule to .
Raise to the power of .
Raise to the power of .
To write as a fraction with a common denominator, multiply by .
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
Combine.
Multiply by .
Combine the numerators over the common denominator.
Simplify the numerator.
Multiply by .
Subtract from .
Rewrite as .
Simplify the numerator.
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
Simplify the denominator.
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
Simplify terms.
Cancel the common factor of .
Cancel the common factor.
Rewrite the expression.
Combine and .
The result can be shown in multiple forms.
Exact Form:
Decimal Form:
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### Name

Name one billion six hundred sixty-three million one hundred sixty-three thousand two hundred eighty-three

### Interesting facts

• 1663163283 has 16 divisors, whose sum is 2278666656
• The reverse of 1663163283 is 3823613661
• Previous prime number is 4241

### Basic properties

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

### Name

Name one billion eight hundred fifty-seven million three hundred eighteen thousand three hundred fifty-two

### Interesting facts

• 1857318352 has 32 divisors, whose sum is 9402674238
• The reverse of 1857318352 is 2538137581
• Previous prime number is 2

### Basic properties

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

### Name

Name one billion five hundred ninety-one million nine hundred sixty-one thousand eight hundred twenty-three

### Interesting facts

• 1591961823 has 8 divisors, whose sum is 2358462000
• The reverse of 1591961823 is 3281691951
• Previous prime number is 3

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 10
• Sum of Digits 45
• Digital Root 9