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About Scott A Wilson
Expertise
I can answer any question in algebra, pre-calculus, probability, trigonometry, or statistics.
Experience
Experience in the area; I have tutored people over the years in algebra, basic math, and statistics.
I worked at The Boeing Company for over 5 years.
Education/Credentials: MS degreee in Mathematics from Oregon State Univeristy; taken well over 100 hours of upper division credits in mathematical courses such as calculus, statistics, probabilty, linear algrebra, powers, linear regression, matrices, and more.
I graduated with honors.
Past/Present Clients: College Students at OSU, various math people since college, over 700 people in math and calculus.
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You are here: Experts > Science > Mathematics > Advanced Math > Trigonometry
Expert: Scott A Wilson
Date: 5/14/2008
Subject: Trigonometry
Question
I am looking for a formula regarding non-right triangles. it looked something like "a/A=b/B=c/C" where a, b, c = angles and A,B,C = side lengths. I need to find a length knowing one side and included angle. Thank you.
Answer
Let's say that you know b and A. From here, we know that a/A=b/B and from the law of sines, we know that sin(a)/A=sin(b)/B (law of sines).
Using these two formulas, B and a can be found.
It is also known that the sum of three angles in a triangle is 180 degrees (pi radians), so once we have a, we can find c.
Using the law of sines with angles a and c involved (hence sides A and C), side C can be found.
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