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anonymous
 3 years ago
Find the length of a if the measure of angle A equals 62 degrees b = 15, and c = 21.
anonymous
 3 years ago
Find the length of a if the measure of angle A equals 62 degrees b = 15, and c = 21.

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1338954330473:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Do you know if one of the angles are 90 degrees? I mean in the problem, not in the picture i just drew.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0i seen this prob before

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0ok then i'm not sure. Because you can use sin, cos, tan only when it's a right triangle. sorry :(

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1338954774600:dw

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0do you know the law of cosines?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Yes, it's Law of Cosines problem

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0a^2 = 21^2 + 15^2  2*21*15cosA

AravindG
 3 years ago
Best ResponseYou've already chosen the best response.1\[\huge \cos A =\frac{b^2+c^2a^2}{2bc}\]

AravindG
 3 years ago
Best ResponseYou've already chosen the best response.1bt i didnt get any medals :(
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