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if a:b:c=2: root6: root3 +1 then angle C = a)45 b)60 c)75 d)90

if a:b:c=2: root6: root3 +1 then angle C =
 a)45  b)60  c)75  d)90

Grade:12

1 Answers

utkarsh
11 Points
5 years ago
cos(c)=a(square)+b(square)-c(square)/2(a)(b)
=>cos(c)=4+6-3-1\2(2)(6(root)
here cos(c)=0.58
=>c=60

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