Ambiguous Case of the Sine Law • [2.3c] Pre-Calculus 11

Sometimes you can have two possible solutions when using the sine law to find an angle! This video introduces and explains the ambiguous case of the Sine Law (two triangles possible) as well as the other cases that are possible (one or no triangles possible) when given an angle and two side lengths (and the angle is not between the two sides).

My instructional approach emphasizes conceptual understanding of and connections between concepts and ideas, rather than just pure memorization.

Corresponds to chapter 2, section 2.3 in McGraw-Hill's Pre-Calculus 11, but also fits with the trigonometry unit from almost any other Pre-Calculus course or textbook.

#PreCalc11bytheAAMG

[danielnegussie]

Easy to follow and very helpful tutorial, thank you.

[RoseAngella]

Beautifully demonstrated and explained. 🧡

[renewd]

Your graphical tool was on point. Well done.

[zanonoza]

You're a great teacher . Thank you sir 🙏.

[doriosmond]

Great video! Could you tell me what software / app you are using to show the sliding side of the triangle in the 2nd half of the video? Thx!

[maqboolahmad]

I have a triangle ABC line AB 40 units, 30° on point A(CAB), & 34 units on point BC, how to calculate the value of AC. Please solved it.

[neilpurdy]

Excellent demonstration. What's the password to open the pdf?