Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 10 - Radical Expressions and Equations - 10-6 Trigonometric Ratios - Practice and Problem-Solving Exercises - Page 639: 46

Answer

$\approx 0.25$.

Work Step by Step

The slope of a line, $m$, is the change in $y$ over the change in $x$. Therefore, the slope of the line that makes a $14^\circ$ angle with the positive $x$-axis is $$ m=\frac{y}{x} .$$ Also, a line that forms a $14^\circ$ angle with the positive $x$-axis forms a right triangle with the side opposite the angle equal to $y$ and the side adjacent to the angle equal to $x$. Using the trigonometric ratios of a right triangle, then $$ \tan14^\circ=\frac{y}{x} .$$ By the Transitive Property of Equality, then $$ m=\tan14^\circ\approx0.25 .$$Hence, the slope of the line is approximately $0.25$.
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