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September 15th, 2009, 02:44 PM   #1
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Trig Math Help Please

Could someone please help explain with these questions please? I don't understand how I could do this and I am just confused...

If 0 degrees ? A ? 180 degrees, find two values for two angles if SinA =0.7431

In triangle ABC a=11.4 c=8.1 and Angle C =36 degrees What is the measure of Angle A? (this one I think is a ambiguous case but I don't know what to do with it)

Please Help!! Thanks!!
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September 15th, 2009, 03:56 PM   #2
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Re: Trig Math Help Please

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Originally Posted by bb_gone
Could someone please help explain with these questions please? I don't understand how I could do this and I am just confused...

If 0 degrees ? A ? 180 degrees, find two values for two angles if SinA =0.7431

In triangle ABC a=11.4 c=8.1 and Angle C =36 degrees What is the measure of Angle A? (this one I think is a ambiguous case but I don't know what to do with it)

Please Help!! Thanks!!
For the first question, get the value of A (between 0 and 90 deg.) from the table.
The other value will be 180 - first value.

For the second, use the law of sines (sinC)/c = (sinA)/a to get sinA, then use the same procedure as in question one to get the 2 values for A.
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