If 0 π/2, show that (tan x+sin x)1/2 + (tan x- sin x)1/2=2(tan x)1/2 cos( π/4-x/2)
If 0 π/2, show that (tan x+sin x)1/2 + (tan x- sin x)1/2=2(tan x)1/2 cos( π/4-x/2)
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