Trigonometry Examples

$- 4.2 π$

Step 1

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

$(- 4.2 π) \cdot \frac{180 °}{π}$

Step 2

Multiply $- 4.2$ by $π$ .

$- 13.19468914 \cdot \frac{180}{π}$

Step 3

Multiply $- 13.19468914 \frac{180}{π}$ .

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Step 3.1

Combine $- 13.19468914$ and $\frac{180}{π}$ .

$\frac{- 13.19468914 \cdot 180}{π}$

Step 3.2

Multiply $- 13.19468914$ by $180$ .

$\frac{- 2375.04404611}{π}$

Step 4

Move the negative in front of the fraction.

$- \frac{2375.04404611}{π}$

Step 5

Replace $π$ with an approximation.

$- \frac{2375.04404611}{3.14159265}$

Step 6

Divide $2375.04404611$ by $3.14159265$ .

$- 1 \cdot 756$

Step 7

Multiply $- 1$ by $756$ .

$- 756$

Step 8

Convert to a decimal.

$- 756 °$