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in a triangle abc, if cos^A/2 + Cos^B/2 +Cos^C/2 = y(x^2 + 1/x^2) then maximum value of y is

in a triangle abc, if cos^A/2 + Cos^B/2 +Cos^C/2 = y(x^2 + 1/x^2) then maximum value of y is 

Grade:12

2 Answers

jagdish singh singh
173 Points
11 years ago

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SAGAR SINGH - IIT DELHI
879 Points
11 years ago

Dear student,

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x2+1/x2>2

So the maximum value of y is 9/8.

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