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anonymous
 5 years ago
what is the law of cosine
anonymous
 5 years ago
what is the law of cosine

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0like pythagoras but not for right triangles \[a^2=b^2+c^22b c\ cos(A)\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0there's a diagram at the wikipedia site

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i still can get this question thoough in tirangle ABC, a=8 b=9 and m of angle C = 135 what is the area of ABC

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Area is base times height divided by 2, which can be found without the law of cosines, the height would be the sine of 135 times 8 if the base is 9

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0sin(135) = sin(45) = sqrt(2)/2 Area = 9*8*(sqrt(2)/2)/2

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0thank you that was an answer
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