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[" 56."4ft(tan x+sin x)=m" TRT "(tan x-s...

[" 56."4ft(tan x+sin x)=m" TRT "(tan x-sin x)=nvec s uarr,vec at(m^(2)-n^(2))=?],[[" (a) "sqrt(mn)," (b) "2sqrt(mn)," (c) "4sqrt(mn)]]

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