Grade 11Trigonometry
Find the angles of triangles in which a=2,b=1and c=√3
Find the angles of triangles in which a=2,b=1and c=√3
1 Answer
Arun
Dear student
Cos A = b² + c² - a² /2bc = 4-4 /2bc = 0
Hence
Angle A = 90°
Cos B = c² + a² - b² /2ac = 6 /4 sqrt(3) = (sqrt 3)/2
Hence B = 30 °
Now C = 60°
Regards
Arun
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