# trigonometry

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Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30"

I have to use logarithms and law of tangents . and then provide the check.
which says law of sine or mollweids equation. I can't us the cosine law.

• trigonometry -

I have posted a corrected version of solution using the law of tangents.
I believe by now you are capable of doing the calculations (multiplications and divisions) using logarithms.

I found the third side (c) using the cosine rule, but it gives the same answer as the sine rule, similar to what you did.

http://www.jiskha.com/display.cgi?id=1298609593

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