Trigonometry Examples

$\frac{b}{a} + \frac{1}{b}$

Step 1

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

$\frac{b}{a} \cdot \frac{b}{b} + \frac{1}{b}$

Step 2

To write $\frac{1}{b}$ as a fraction with a common denominator, multiply by $\frac{a}{a}$ .

$\frac{b}{a} \cdot \frac{b}{b} + \frac{1}{b} \cdot \frac{a}{a}$

Step 3

Write each expression with a common denominator of $a b$ , by multiplying each by an appropriate factor of $1$ .

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Step 3.1

Multiply $\frac{b}{a}$ by $\frac{b}{b}$ .

$\frac{b \cdot b}{a b} + \frac{1}{b} \cdot \frac{a}{a}$

Step 3.2

Multiply $\frac{1}{b}$ by $\frac{a}{a}$ .

$\frac{b \cdot b}{a b} + \frac{a}{b a}$

Step 3.3

Reorder the factors of $b a$ .

$\frac{b \cdot b}{a b} + \frac{a}{a b}$

Step 4

Combine the numerators over the common denominator.

$\frac{b \cdot b + a}{a b}$

Step 5

Multiply $b$ by $b$ .

$\frac{b^{2} + a}{a b}$