Trigonometry Examples

$π - (- \frac{π}{4})$

Step 1

Multiply $- (- \frac{π}{4})$ .

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Multiply $- 1$ by $- 1$ .

$π + 1 \frac{π}{4}$

Multiply $\frac{π}{4}$ by $1$ .

$π + \frac{π}{4}$

Step 2

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

$π \cdot \frac{4}{4} + \frac{π}{4}$

Step 3

Combine fractions.

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Combine $π$ and $\frac{4}{4}$ .

$\frac{π \cdot 4}{4} + \frac{π}{4}$

Combine the numerators over the common denominator.

$\frac{π \cdot 4 + π}{4}$

Step 4

Simplify the numerator.

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Move $4$ to the left of $π$ .

$\frac{4 \cdot π + π}{4}$

Add $4 π$ and $π$ .

$\frac{5 π}{4}$

Step 5

The result can be shown in multiple forms.

Exact Form:

$\frac{5 π}{4}$

Decimal Form:

$3.92699081 \dots$