Welcome to Trigonometry Online
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    • Intro to Trig Functions
    • Finding side lengths
    • Finding Angle Measures
    • Special Right Triangles
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  • Unit Circle
    • Angles and Degrees
    • Angles and Radians
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  • Transformations
    • Pre-Knowledge
    • Graphing Sin and Cos
    • Graphing Sec and Csc
    • Graphing Tan and Cot
    • Real World Application
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  • Identities
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  • Equations
    • Half Angle
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    • Solving
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  • Law of Sin & Cos
    • Law of Sines
    • Law of Cosine
    • Solving Triangles
    • Area of Trigangles
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Objective

To apply the law of sine formula to find side lengths and angle measures of all types of triangles.

Web Resources

http://www.mathsisfun.com/algebra/trig-sine-law.html        Pay attention to the formula and how to cross multiply.

http://hyperphysics.phy-astr.gsu.edu/hbase/lsin.html    Check your answers with this law of sin calculator

http://www.mathwarehouse.com/trigonometry/law-of-sines/formula-and-practice-problems.php      Great extra notes with step-by-step directions and extra videos.

http://www.regentsprep.org/Regents/math/algtrig/ATT12/lawsinespractice.htm   
    Practice Problems with Solution Button

http://www.mathopenref.com/lawofsines.html        Animated triangle explaining law of sin


Lesson Video

Pay Attention to the Following:

1.  The law of sin formula

2.  How to cross multiply

3.  The parts given in the formula and how to  
         find sides and angles
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