Trigonometry Examples

$9 π$

Step 1

Subtract $2 π$ from $9 π$ .

$9 π - 2 π$

Step 2

The resulting angle of $7 π$ is positive, less than $2 π$ , and coterminal with $9 π$ .

$7 π$

Step 3

Subtract $2 π$ from $7 π$ .

$7 π - 2 π$

Step 4

The resulting angle of $5 π$ is positive, less than $2 π$ , and coterminal with $9 π$ .

$5 π$

Step 5

Subtract $2 π$ from $5 π$ .

$5 π - 2 π$

Step 6

The resulting angle of $3 π$ is positive, less than $2 π$ , and coterminal with $9 π$ .

$3 π$

Step 7

Subtract $2 π$ from $3 π$ .

$3 π - 2 π$

Step 8

The resulting angle of $π$ is positive, less than $2 π$ , and coterminal with $9 π$ .

$π$