Trig: Word Problems - Sine, Cosine & Tangent

http://www.mindbites.com/lesson/5121-trig-word-problems-sine-cosine-tangent-305

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)

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[11011zz11011]

Too bad the full lesson costs $15.84!! can you say Rip off!

[Hermionexoxxox]

THANK YOU YOU'RE THE ONLY ONE THAT MAKES SENSE!!!

[droceretik]

In practical terms, the altitude cannot be measured accurately using line angle and line length unless a catenary equation is used. A more accurate measure is to use kite angle of elevation and horizontal distance to the kite. This can be done using and inclinometer or more accurately a theodolite. Why is your method not accurate? Gravity and wind drag cause line sag. There is nothing wrong with your maths. You could use the tan ratio with the kite angle and horizontal distance. I use GPS!

[00Mj000]

8000 viewer :D

[pitoms]

x should be approximately not equla to :)

[fruitygurl17]

OMG thank you sooooo much this really helped me a lot in my math homeworks!!! Thank you:]

[missclaradancer]

thank gosh, this helped, ehhehe