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anonymous
 4 years ago
i need help solving a triangle with a Angle of 39.4 degrees there are 2 sides the longest side is 7.11 and a leg that is 3.56 i have to find the side opposite the 39.4 degree angle and the angles that correspond with the 2 sides
anonymous
 4 years ago
i need help solving a triangle with a Angle of 39.4 degrees there are 2 sides the longest side is 7.11 and a leg that is 3.56 i have to find the side opposite the 39.4 degree angle and the angles that correspond with the 2 sides

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Hero
 4 years ago
Best ResponseYou've already chosen the best response.0You see that draw button? You should click that and try to create the triangle.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1327274366132:dw this is what it looks like

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0which is \[\sqrt{b ^{2}+c ^{2}ABcos(\theta)}\]right

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0BCcos(theta)*** sorry

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0no.. use a^2 = b^2 + c^2  2*b*c*cos(A)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thats what is throwing me off

phi
 4 years ago
Best ResponseYou've already chosen the best response.1and use the law of sines to find the angles.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0im convinced that im doing everything right but i cannot seem to get the right answer, i know this because i can not get the interior angles to equal 180 degrees

phi
 4 years ago
Best ResponseYou've already chosen the best response.1what did you get for the 3rd side?

phi
 4 years ago
Best ResponseYou've already chosen the best response.1A to scale picture might help here dw:1327279521199:dw

phi
 4 years ago
Best ResponseYou've already chosen the best response.1notice that the angle opposite 7.11 is quite large. Also, notice that sin A = x can have 2 answers symmetric about 90º (actually an infinite number of answers if we keep going... but only 2 within 180º)

phi
 4 years ago
Best ResponseYou've already chosen the best response.1if you found A find 90 + (90A) = 180A

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0i used the law of sines and computed 7.11sin(39.4)/4.91 in my calculator but i took the inverse sin of the that

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0and i repeated for the final angle and got 27.4

phi
 4 years ago
Best ResponseYou've already chosen the best response.1but for the angle opposite side 7.11, 66.8 is too small. Find the *other angle* which is 180A, or 18066.8

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0well that should be 78 degrees but im getting 27.4

phi
 4 years ago
Best ResponseYou've already chosen the best response.1I am not being clear, am I? Your 39.4 and 27.4 are correct. the problem is your 66.8 is not correct. You did it right (take the inverse sin of 7.11sin(39.4)/4.91 but notice that there is another angle that has exactly the same sin (see picture up above) that angle is at 18066.8

phi
 4 years ago
Best ResponseYou've already chosen the best response.1The only way to know which angle to choose is to notice that one of the angles is obtuse (greater than 90º) You found one way to notice... the angles did not add up to 180º so the culprit is the angle opposite the longest side, because that will be the largest angle

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0okay ya that makes sense

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0thank you so very much
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