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Find angles m and n.

 

 Aug 3, 2020
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Use the law of cosines to calculate the angels.

 

a= b+ c−2bc * cos(A)

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Example:

Triangle ABC has sides: a=2, b=3, c=4

 

22 = 32 + 42 - 2*3*4*cos(A)

 

cos(A) = 32 + 42 - 22/ 2*3*4 = 0.875

 

Angle  A = 28.955º

 Aug 3, 2020
edited by Dragan  Aug 3, 2020

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