Trig: Word Problems  Sine, Cosine & Tangent 305
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About this Lesson
 Type: Video Tutorial
 Length: 78:18
 Media: Flash video file
 Use: Watch Online
 Access Period: 90 Days
 Posted: 08/04/2009
This lesson is part of the following series:
College Prep Math for Mature Students (16 Lessons) (21 lessons, $39.60)
Trigonometry (13 Lessons) (13 lessons, $33.66)
Beginning Trigonometry, Sin Cos Tan Sec Csc & Cot (3 lessons, $12.87)
Trigonometry  Begin With The Basics (3 Lessons) (3 lessons, $12.87)
This 78 minute trigonometry lesson is an opportunity to see how the skills learned in Lesson 300 Basic Trigonometry Part I are used to solving word problems using the 3 primary trig ratios, sin, cos and tan. You find unknown sides and angles in right angle triangles to solve word problems that involve:
 a kite on the end of a string, diagonal of a rectangle, support wires, shadows, ladders, trees, buildings, stairways and more
 angle of elevation and angle of depression
 rise & run
Sample problem: An airplane is flying over a forest at an altitude of 1600 ft. when the pilot sights a fire. He measures the angle of depression and finds it to be 46 degrees. How far is the fire, to the nearest tenth of a ft. from a point on land directly below the airplane?
This lesson contains explanations of the concepts and 17 example questions with step by step solutions plus 3 interactive review questions with solutions.
The following lesson will help you with the fundamentals of this lesson:
 300 Basic Trigonometry Part I (http://www.mindbites.com/lesson/5125)
About this Author
 Teacher Sydney
 65 lessons
 Joined:
07/02/2009
Teacher Sydney is a certified teacher, B.A., B. Ed. (Math Major). She prepared a math help program consisting of 65 very comprehensive, plain and "no fluff" math video lessons.
These lessons are a convenient and easy way to get math help. Pick and choose only the lesson(s) or packages (series) that you want. There are free previews. You might look at the Transcripts for a quick review of the lesson content.
For a complete list of lessons available on MindBites (mathmadesimple.mindbites.com. To access free previews.
To Contact us please email mathmadesimple.com@gmail.com
Recent Reviews
 Kinda rudimentary
 09/25/2009

The actual word problems were kind of silly dealing with kites and whatnot but the math was solid and bringing it all together from the problem was helpful.
The teacher person has a monotone voice but following along with or without sound is actually very easy. So if you need trig practice I found it helpful.
This is a 78 minute trigonometry math help lesson.
An opportunity to use the basic trig skills learned in lesson 300 to solve word problems
Sine (sin)
Cosine (cos)
Tangent (tan)
Word problems with unknown sides, angles of elevation and depression, ladders, road grade, % (percent grade)
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The actual word problems were kind of silly dealing with kites and whatnot but the math was solid and bringing it all together from the problem was helpful.
The teacher person has a monotone voice but following along with or without sound is actually very easy. So if you need trig practice I found it helpful.