Trigonometry Examples

$\frac{1 + \frac{2 t + 1 - t^{2}}{1 + t^{2}}}{1 + \frac{2 t - 1 + t^{2}}{1 + t^{2}}}$

Step 1

Multiply the numerator and denominator of the fraction by $1 + t^{2}$ .

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Step 1.1

Multiply $\frac{1 + \frac{2 t + 1 - t^{2}}{1 + t^{2}}}{1 + \frac{2 t - 1 + t^{2}}{1 + t^{2}}}$ by $\frac{1 + t^{2}}{1 + t^{2}}$ .

$\frac{1 + t^{2}}{1 + t^{2}} \cdot \frac{1 + \frac{2 t + 1 - t^{2}}{1 + t^{2}}}{1 + \frac{2 t - 1 + t^{2}}{1 + t^{2}}}$

Step 1.2

Combine.

$\frac{(1 + t^{2}) (1 + \frac{2 t + 1 - t^{2}}{1 + t^{2}})}{(1 + t^{2}) (1 + \frac{2 t - 1 + t^{2}}{1 + t^{2}})}$

Step 2

Apply the distributive property.

$\frac{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{2 t + 1 - t^{2}}{1 + t^{2}}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{2 t - 1 + t^{2}}{1 + t^{2}}}$

Step 3

Simplify by cancelling.

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Step 3.1

Reorder terms.

$\frac{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{- t^{2} + 2 t + 1}{1 + t^{2}}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{2 t - 1 + t^{2}}{1 + t^{2}}}$

Step 3.2

Reorder terms.

$\frac{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{- t^{2} + 2 t + 1}{1 + t^{2}}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4

Simplify the numerator.

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Step 4.1

Factor $1 + t^{2}$ out of $(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{- t^{2} + 2 t + 1}{1 + t^{2}}$ .

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Step 4.1.1

Factor $1 + t^{2}$ out of $(1 + t^{2}) \cdot 1$ .

$\frac{(1 + t^{2}) (1) + (1 + t^{2}) \frac{- t^{2} + 2 t + 1}{1 + t^{2}}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.1.2

Factor $1 + t^{2}$ out of $(1 + t^{2}) (1) + (1 + t^{2}) (\frac{- t^{2} + 2 t + 1}{1 + t^{2}})$ .

$\frac{(1 + t^{2}) (1 + \frac{- t^{2} + 2 t + 1}{1 + t^{2}})}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.2

Write $1$ as a fraction with a common denominator.

$\frac{(1 + t^{2}) (\frac{1 + t^{2}}{1 + t^{2}} + \frac{- t^{2} + 2 t + 1}{1 + t^{2}})}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.3

Combine the numerators over the common denominator.

$\frac{(1 + t^{2}) \frac{1 + t^{2} - t^{2} + 2 t + 1}{1 + t^{2}}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.4

Reorder terms.

$\frac{(1 + t^{2}) \frac{t^{2} - t^{2} + 2 t + 1 + 1}{t^{2} + 1}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.5

Rewrite $\frac{t^{2} - t^{2} + 2 t + 1 + 1}{t^{2} + 1}$ in a factored form.

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Step 4.5.1

Subtract $t^{2}$ from $t^{2}$ .

$\frac{(1 + t^{2}) \frac{0 + 2 t + 1 + 1}{t^{2} + 1}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.5.2

Add $0$ and $2 t$ .

$\frac{(1 + t^{2}) \frac{2 t + 1 + 1}{t^{2} + 1}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.5.3

Add $1$ and $1$ .

$\frac{(1 + t^{2}) \frac{2 t + 2}{t^{2} + 1}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.5.4

Factor $2$ out of $2 t + 2$ .

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Step 4.5.4.1

Factor $2$ out of $2 t$ .

$\frac{(1 + t^{2}) \frac{2 (t) + 2}{t^{2} + 1}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.5.4.2

Factor $2$ out of $2$ .

$\frac{(1 + t^{2}) \frac{2 (t) + 2 (1)}{t^{2} + 1}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 4.5.4.3

Factor $2$ out of $2 (t) + 2 (1)$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 5

Simplify the denominator.

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Step 5.1

Factor $1 + t^{2}$ out of $(1 + t^{2}) \cdot 1 + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}$ .

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Step 5.1.1

Factor $1 + t^{2}$ out of $(1 + t^{2}) \cdot 1$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) (1) + (1 + t^{2}) \frac{t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 5.1.2

Factor $1 + t^{2}$ out of $(1 + t^{2}) (1) + (1 + t^{2}) (\frac{t^{2} + 2 t - 1}{1 + t^{2}})$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) (1 + \frac{t^{2} + 2 t - 1}{1 + t^{2}})}$

Step 5.2

Write $1$ as a fraction with a common denominator.

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) (\frac{1 + t^{2}}{1 + t^{2}} + \frac{t^{2} + 2 t - 1}{1 + t^{2}})}$

Step 5.3

Combine the numerators over the common denominator.

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{1 + t^{2} + t^{2} + 2 t - 1}{1 + t^{2}}}$

Step 5.4

Reorder terms.

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{t^{2} + t^{2} + 2 t + 1 - 1}{t^{2} + 1}}$

Step 5.5

Rewrite $\frac{t^{2} + t^{2} + 2 t + 1 - 1}{t^{2} + 1}$ in a factored form.

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Step 5.5.1

Add $t^{2}$ and $t^{2}$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{2 t^{2} + 2 t + 1 - 1}{t^{2} + 1}}$

Step 5.5.2

Subtract $1$ from $1$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{2 t^{2} + 2 t + 0}{t^{2} + 1}}$

Step 5.5.3

Add $2 t^{2} + 2 t$ and $0$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{2 t^{2} + 2 t}{t^{2} + 1}}$

Step 5.5.4

Factor $2 t$ out of $2 t^{2} + 2 t$ .

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Step 5.5.4.1

Factor $2 t$ out of $2 t^{2}$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{2 t (t) + 2 t}{t^{2} + 1}}$

Step 5.5.4.2

Factor $2 t$ out of $2 t$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{2 t (t) + 2 t (1)}{t^{2} + 1}}$

Step 5.5.4.3

Factor $2 t$ out of $2 t (t) + 2 t (1)$ .

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{2 t (t + 1)}{t^{2} + 1}}$

Step 6

Cancel the common factor of $1 + t^{2}$ .

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Step 6.1

Cancel the common factor.

$\frac{(1 + t^{2}) \frac{2 (t + 1)}{t^{2} + 1}}{(1 + t^{2}) \frac{2 t (t + 1)}{t^{2} + 1}}$

Step 6.2

Rewrite the expression.

$\frac{\frac{2 (t + 1)}{t^{2} + 1}}{\frac{2 t (t + 1)}{t^{2} + 1}}$

Step 7

Multiply the numerator by the reciprocal of the denominator.

$\frac{2 (t + 1)}{t^{2} + 1} \cdot \frac{t^{2} + 1}{2 t (t + 1)}$

Step 8

Cancel the common factor of $2 (t + 1)$ .

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Step 8.1

Factor $2 (t + 1)$ out of $2 t (t + 1)$ .

$\frac{2 (t + 1)}{t^{2} + 1} \cdot \frac{t^{2} + 1}{2 (t + 1) (t)}$

Step 8.2

Cancel the common factor.

$\frac{2 (t + 1)}{t^{2} + 1} \cdot \frac{t^{2} + 1}{2 (t + 1) t}$

Step 8.3

Rewrite the expression.

$\frac{1}{t^{2} + 1} \cdot \frac{t^{2} + 1}{t}$

Step 9

Cancel the common factor of $t^{2} + 1$ .

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Step 9.1

Cancel the common factor.

$\frac{1}{t^{2} + 1} \cdot \frac{t^{2} + 1}{t}$

Step 9.2

Rewrite the expression.

$\frac{1}{t}$