a obtuse triangle with length ab=24 bc=36 and ac=49 use cos forumla to find its angles help plz...
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Cos rule: $\displaystyle c^2 = a^2+b^2-2ab \cos(C)$ Plug and chug to find one angle then you can use the sin rule to find the second
Originally Posted by antikv a obtuse triangle with length ab=24 bc=36 and ac=49 use cos forumla to find its angles help plz... Law of Cosines -- from Wolfram MathWorld Kind regards $\displaystyle \chi$ $\displaystyle \sigma$
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