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

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some1Best ResponseYou've already chosen the best response.1
Do you know if one of the angles are 90 degrees? I mean in the problem, not in the picture i just drew.
 one year ago

Cortegu10Best ResponseYou've already chosen the best response.0
i seen this prob before
 one year ago

some1Best ResponseYou've already chosen the best response.1
ok then i'm not sure. Because you can use sin, cos, tan only when it's a right triangle. sorry :(
 one year ago

dpaIncBest ResponseYou've already chosen the best response.0
do you know the law of cosines?
 one year ago

AravindGBest ResponseYou've already chosen the best response.1
ya use law of cosines
 one year ago

Abbie23Best ResponseYou've already chosen the best response.0
Yes, it's Law of Cosines problem
 one year ago

Cortegu10Best ResponseYou've already chosen the best response.0
use law of sine here
 one year ago

dpaIncBest ResponseYou've already chosen the best response.0
a^2 = 21^2 + 15^2  2*21*15cosA
 one year ago

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

AravindGBest ResponseYou've already chosen the best response.1
bt i didnt get any medals :(
 one year ago
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