Geometry!! Please wait as I finish drawing the problem.

a. andgle A
b. angle B
c. angle C

Question

Geometry!! Please wait as I finish drawing the problem.

a. andgle A
b. angle B
c. angle C

anonymous · Answer

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dumbcow · Answer

use Law of Cosines to find angles

anonymous · Answer

are you familiar with law of cosines ?

anonymous · Answer

yea such as soh cah toa?

dumbcow · Answer

not quite

$$c^{2} = a^{2}+b^{2}-2ab \cos C$$

anonymous · Answer

I don't believe I'm familiar with that :/

dumbcow · Answer

thats ok, its a formula (you can look it up in your textbook)
its like the pythagorean thm but for all triangles not just right triangles

anyway using this formula you can solve for an angle given all 3 sides

dumbcow · Answer

$$\cos C = \frac{a^{2} +b^{2} -c^{2}}{2ab}$$

anonymous · Answer

like sine, cosine, and tangent?

dumbcow · Answer

not sure what you mean
sin/cos/tan are trig ratios related to a right triangle

you are going to use the cos ratio in this formula to solve for one of the angles

anonymous · Answer

Alrighty, but how do I know which number goes under which letter in the formula?

dumbcow · Answer

ahh well side "a" is across from angle A
and so on...

dumbcow · Answer

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