Trigonometry> properties and solution of triangle...

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

Nirabhra Agrawal , 15 Years ago

Grade 12

2 Answers

jagdish singh singh

Last Activity: 15 Years ago

SAGAR SINGH - IIT DELHI

Dear student,

x2+1/x2>2

So the maximum value of y is 9/8.

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Sagar Singh

B.Tech, IIT Delhi

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Last Activity: 15 Years ago