Trigonometry Examples

$\frac{- 3 π}{2}$

Step 1

Convert the radian measure to degrees.

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Step 1.1

To convert radians to degrees, multiply by $\frac{180}{π}$ , since a full circle is $360 °$ or $2 π$ radians.

$(\frac{- 3 π}{2}) \cdot \frac{180 °}{π}$

Step 1.2

Cancel the common factor of $π$ .

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Step 1.2.1

Factor $π$ out of $- 3 π$ .

$\frac{π \cdot - 3}{2} \cdot \frac{180}{π}$

Step 1.2.2

Cancel the common factor.

$\frac{π \cdot - 3}{2} \cdot \frac{180}{π}$

Step 1.2.3

Rewrite the expression.

$\frac{- 3}{2} \cdot 180$

Step 1.3

Cancel the common factor of $2$ .

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Step 1.3.1

Factor $2$ out of $180$ .

$\frac{- 3}{2} \cdot (2 (90))$

Step 1.3.2

Cancel the common factor.

$\frac{- 3}{2} \cdot (2 \cdot 90)$

Step 1.3.3

Rewrite the expression.

$- 3 \cdot 90$

Step 1.4

Multiply $- 3$ by $90$ .

$- 270$

Step 1.5

Convert to a decimal.

$- 270 °$

Step 2

For angles smaller than $0 °$ , add $360 °$ to the angle until the angle is larger than $0 °$ .

$90$

Step 3

The angle is between the first and second quadrant.

Between Quadrant $1$ and $2$

Step 4