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Topic: [math-learn] Trig equations
Replies: 4   Last Post: Feb 6, 2001 5:12 PM

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Murray H. Siegel

Posts: 89
Registered: 12/6/04
Re: [math-learn] Trig equations
Posted: Feb 6, 2001 4:09 PM
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>Rex asked:

>>Opinions, please, on solving trig equations.
>>Example, Solve sin 4x = -sqrt(3)/2 in [0, 2pi]
>>I teach this traditionally, but if a student asked me why she can't just
>>solve this using her graphics calculator, I would have to mumble things
>>about patterns, elegance, understanding, etc.
>>How would you answer such a question?

If I did not want the student using the calculator, I would write
the problem:

Solve for x [1, 2pi] sin(ax) = -sqrt(3)/2

Murray Siegel
Sam Houston State U.

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