Tangent of an angle

If the tangent of an angle of a right angled triangle is 0.8. Then its longest side is. .. .

Correct result:

c =  1.2806 b


tanA=0.8 tanA=a/b a/b=0.8  a=0.8 b  c=a2+b2=b0.82+12 c=0.82+12=1.2806 b

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