Trigonometry Examples

$A = \arctan (\frac{555}{320})$

Simplify $\arctan (\frac{555}{320})$ .

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Cancel the common factor of $555$ and $320$ .

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Factor $5$ out of $555$ .

$A = \arctan (\frac{5 (111)}{320})$

Cancel the common factors.

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Factor $5$ out of $320$ .

$A = \arctan (\frac{5 \cdot 111}{5 \cdot 64})$

Cancel the common factor.

$A = \arctan (\frac{5 \cdot 111}{5 \cdot 64})$

Rewrite the expression.

$A = \arctan (\frac{111}{64})$

Evaluate $\arctan (\frac{111}{64})$ .

$A = 1.04777801$

Graph each side of the equation. The solution is the x-value of the point of intersection.

$A \approx 1.04777801$