body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Big Ideas Math Algebra 2, 2014

BI

Big Ideas Math Algebra 2, 2014 View details

Chapter Review

Continue to next subchapter

Exercise 1 Page 526

In a right triangle, the cosine of an acute angle is defined as the ratio of the adjacent side to the hypotenuse.

$sin θ = \frac{8 5}{1 1},$ $tan θ = \frac{8 5}{6},$ $csc θ = \frac{1 1 8 5}{8 5},$ $sec θ = \frac{1 1}{6},$ $cot θ = \frac{6 8 5}{8 5} \frac{∣}{∣}$

Practice makes perfect

Given that $cos θ = \frac{6}{1 1},$ we want to evaluate the other five trigonometric ratios of $θ .$ We will begin by sketching a right triangle with $θ$ as the measure of one acute angle.

Drawing the Triangle

In a right triangle, the cosine of an acute angle is defined as the ratio of the

adjacent

side to the

hypotenuse .

cos θ = \frac{6}{1 1} \Leftrightarrow cos θ = \frac{adjacent}{hypotenuse}

A shortcut to better grades

Download the app and create a free account to view full content

Subchapter links