# Solve for a in Degrees tan(a)=73.7/39.4

Solve for a in Degrees tan(a)=73.7/39.4
Divide by .
Take the inverse tangent of both sides of the equation to extract from inside the tangent.
Simplify the right side.
Evaluate .
The tangent function is positive in the first and third quadrants. To find the second solution, subtract the reference angle from to find the solution in the fourth quadrant.
Find the period of .
The period of the function can be calculated using .
Replace with in the formula for period.
The absolute value is the distance between a number and zero. The distance between and is .
Divide by .
The period of the function is so values will repeat every degrees in both directions.
, for any integer
, for any integer
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### Name

Name one hundred thirty-eight million two thousand eight hundred seventeen

### Interesting facts

• 138002817 has 8 divisors, whose sum is 184138240
• The reverse of 138002817 is 718200831
• Previous prime number is 1429

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 30
• Digital Root 3

### Name

Name two hundred sixty-six million four hundred ninety-seven thousand two hundred seven

### Interesting facts

• 266497207 has 4 divisors, whose sum is 266976216
• The reverse of 266497207 is 702794662
• Previous prime number is 557

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 43
• Digital Root 7

### Name

Name eight hundred thirteen million three hundred ninety-nine thousand eight hundred thirty-nine

### Interesting facts

• 813399839 has 8 divisors, whose sum is 930843648
• The reverse of 813399839 is 938993318
• Previous prime number is 751

### Basic properties

• Is Prime? no
• Number parity odd
• Number length 9
• Sum of Digits 53
• Digital Root 8