Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 1 - Test - Page 50: 3

Answer

h= $\sqrt[5] 3$ r=$\sqrt[5] 6$ y=5 x=10

Work Step by Step

Step 1: $45^{\circ} - 45 ^{\circ} -90^{\circ}$ triangle , Now let s be the shorter side . Let r be the longest side, which is the hypotenuse . It has been shown in the section 1.1 that r= $\sqrt 2s$ Step 2: Triangle ADC is $45^{\circ}-45^{\circ}-90^{\circ}$ triangle . Using the above result, r=$\sqrt[s] 2=\sqrt[5] 3(\sqrt 2)=\sqrt[5] 6$. Since the legs are of equal length , h=r=$\sqrt[5] 3$ Step 3: In $30^{\circ}-60^{\circ}-90^{\circ}$ triangle, let us consider y be the shortest side. Let x be the longest side, which happens to a hypotenuse and h be the side opposite $60 ^{\circ}$ angle. It is shown in section 1.1 that x=2y and h=$\sqrt 3y$ Step 4 Triangle CDB is $30^{\circ}-60^{\circ}-90^{\circ}$ triangle . We are given that h=$\sqrt[5] 3$. U?sing the above result, y=$\frac{h}{\sqrt 3}=5$ and x=2y=10
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