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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

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BuyFindarrow_forward

Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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In Exercises 15 to 20, use the sine, cosine, or tangent ratio to find the lengths of the indicated sides to the nearest tenth of a unit.

Chapter 11.3, Problem 20E, In Exercises 15 to 20, use the sine, cosine, or tangent ratio to find the lengths of the indicated

To determine

To find:

The lengths of the indicated sides to the nearest tenth of a unit using the sine, cosine or tangent ratio.

Explanation

Given:

The rectangle ABCD is shown below.

Definition used:

The trigonometric ratios:

sinα=oppositehypotenuse
cosα=adjacenthypotenuse
tanα=oppositeadjacent

Calculation:

Since ABCD is a rectangle, BC=AD.

Thus AD=w.

Consider the right triangle BAD.

Let α=30.

We need to find the value of w, l.

We have sinα=oppositehypotenuse

sin30=w12

We have cosα=adjacenthypotenuse

cos30=l12

Let us use Ti-83 calculator to find the value of sin30,cos30.

Press ON in Ti-83 calculator.

Since we need to find the value of degree, we need to change the mode to degrees.

Press MODE button and use arrow keys to select the “Degree” mode.

Let us find the values, correct to four decimal places.

Since we need the values of sin30,cos30 correct to four decimal places, in MODE, using arrow keys choose the value of “Float” as 4

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Chapter 11 Solutions

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Sect-11.1 P-11ESect-11.1 P-12ESect-11.1 P-13ESect-11.1 P-14ESect-11.1 P-15ESect-11.1 P-16ESect-11.1 P-17ESect-11.1 P-18ESect-11.1 P-19ESect-11.1 P-20ESect-11.1 P-21ESect-11.1 P-22ESect-11.1 P-23ESect-11.1 P-24ESect-11.1 P-25ESect-11.1 P-26ESect-11.1 P-27ESect-11.1 P-28ESect-11.1 P-29ESect-11.1 P-30ESect-11.1 P-31ESect-11.1 P-32ESect-11.1 P-33ESect-11.1 P-34ESect-11.1 P-35ESect-11.1 P-36ESect-11.1 P-37ESect-11.1 P-38ESect-11.1 P-39ESect-11.2 P-1ESect-11.2 P-2ESect-11.2 P-3ESect-11.2 P-4ESect-11.2 P-5ESect-11.2 P-6ESect-11.2 P-7ESect-11.2 P-8ESect-11.2 P-9ESect-11.2 P-10ESect-11.2 P-11ESect-11.2 P-12ESect-11.2 P-13ESect-11.2 P-14ESect-11.2 P-15ESect-11.2 P-16ESect-11.2 P-17ESect-11.2 P-18ESect-11.2 P-19ESect-11.2 P-20ESect-11.2 P-21ESect-11.2 P-22ESect-11.2 P-23ESect-11.2 P-24ESect-11.2 P-25ESect-11.2 P-26ESect-11.2 P-27ESect-11.2 P-28ESect-11.2 P-29ESect-11.2 P-30ESect-11.2 P-31ESect-11.2 P-32ESect-11.2 P-33ESect-11.2 P-34ESect-11.2 P-35ESect-11.2 P-36ESect-11.2 P-37ESect-11.2 P-38ESect-11.2 P-39ESect-11.2 P-40ESect-11.2 P-41ESect-11.2 P-42ESect-11.2 P-43ESect-11.2 P-44ESect-11.2 P-45ESect-11.3 P-1ESect-11.3 P-2ESect-11.3 P-3ESect-11.3 P-4ESect-11.3 P-5ESect-11.3 P-6ESect-11.3 P-7ESect-11.3 P-8ESect-11.3 P-9ESect-11.3 P-10ESect-11.3 P-11ESect-11.3 P-12ESect-11.3 P-13ESect-11.3 P-14ESect-11.3 P-15ESect-11.3 P-16ESect-11.3 P-17ESect-11.3 P-18ESect-11.3 P-19ESect-11.3 P-20ESect-11.3 P-21ESect-11.3 P-22ESect-11.3 P-23ESect-11.3 P-24ESect-11.3 P-25ESect-11.3 P-26ESect-11.3 P-27ESect-11.3 P-28ESect-11.3 P-29ESect-11.3 P-30ESect-11.3 P-31ESect-11.3 P-32ESect-11.3 P-33ESect-11.3 P-34ESect-11.3 P-35ESect-11.3 P-36ESect-11.3 P-37ESect-11.3 P-38ESect-11.3 P-39ESect-11.3 P-40ESect-11.3 P-41ESect-11.3 P-42ESect-11.3 P-43ESect-11.3 P-44ESect-11.3 P-45ESect-11.3 P-46ESect-11.3 P-47ESect-11.4 P-1ESect-11.4 P-2ESect-11.4 P-3ESect-11.4 P-4ESect-11.4 P-5ESect-11.4 P-6ESect-11.4 P-7ESect-11.4 P-8ESect-11.4 P-9ESect-11.4 P-10ESect-11.4 P-11ESect-11.4 P-12ESect-11.4 P-13ESect-11.4 P-14ESect-11.4 P-15ESect-11.4 P-16ESect-11.4 P-17ESect-11.4 P-18ESect-11.4 P-19ESect-11.4 P-20ESect-11.4 P-21ESect-11.4 P-22ESect-11.4 P-23ESect-11.4 P-24ESect-11.4 P-25ESect-11.4 P-26ESect-11.4 P-27ESect-11.4 P-28ESect-11.4 P-29ESect-11.4 P-30ESect-11.4 P-31ESect-11.4 P-32ESect-11.4 P-33ESect-11.4 P-34ESect-11.4 P-35ESect-11.4 P-36ESect-11.4 P-37ESect-11.4 P-38ESect-11.4 P-39ESect-11.4 P-40ESect-11.4 P-41ESect-11.4 P-42ESect-11.4 P-43ESect-11.4 P-44ESect-11.CR P-1CRSect-11.CR P-2CRSect-11.CR P-3CRSect-11.CR P-4CRSect-11.CR P-5CRSect-11.CR P-6CRSect-11.CR P-7CRSect-11.CR P-8CRSect-11.CR P-9CRSect-11.CR P-10CRSect-11.CR P-11CRSect-11.CR P-12CRSect-11.CR P-13CRSect-11.CR P-14CRSect-11.CR P-15CRSect-11.CR P-16CRSect-11.CR P-17CRSect-11.CR P-18CRSect-11.CR P-19CRSect-11.CR P-20CRSect-11.CR P-21CRSect-11.CR P-22CRSect-11.CR P-23CRSect-11.CR P-24CRSect-11.CR P-25CRSect-11.CR P-26CRSect-11.CR P-27CRSect-11.CR P-28CRSect-11.CR P-29CRSect-11.CR P-30CRSect-11.CR P-31CRSect-11.CR P-32CRSect-11.CR P-33CRSect-11.CR P-34CRSect-11.CT P-1CTSect-11.CT P-2CTSect-11.CT P-3CTSect-11.CT P-4CTSect-11.CT P-5CTSect-11.CT P-6CTSect-11.CT P-7CTSect-11.CT P-8CTSect-11.CT P-9CTSect-11.CT P-10CTSect-11.CT P-11CTSect-11.CT P-12CTSect-11.CT P-13CTSect-11.CT P-14CTSect-11.CT P-15CTSect-11.CT P-16CTSect-11.CT P-17CTSect-11.CT P-18CTSect-11.CT P-19CTSect-11.CT P-20CT

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