Question

cosec theta = x^2 + y^2 ÷ 2xy
Find the value of tan theta
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Answer 1

Answer:

∣cosecθ∣=2∣xy∣x2+y2

Now using AM-GM inequality, we get

x2+y2>2∣xy∣

So this gives  cosecθ>1  which is true for all x,y

thanks