Find the Reference Angle (3pi)/4

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Trigonometry

$\frac{3 π}{4}$

Since the angle $\frac{3 π}{4}$ is in the second quadrant, subtract $\frac{3 π}{4}$ from $π$ .

$π - \frac{3 π}{4}$

Simplify the result.

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To write $π$ as a fraction with a common denominator, multiply by $\frac{4}{4}$ .

$π \cdot \frac{4}{4} - \frac{3 π}{4}$

Combine fractions.

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Combine $π$ and $\frac{4}{4}$ .

$\frac{π \cdot 4}{4} - \frac{3 π}{4}$

Combine the numerators over the common denominator.

$\frac{π \cdot 4 - 3 π}{4}$

Simplify the numerator.

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Move $4$ to the left of $π$ .

$\frac{4 \cdot π - 3 π}{4}$

Subtract $3 π$ from $4 π$ .

$\frac{π}{4}$

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