Verify the identity.(tan x + 1)2 + (tan x - 1)2 = 2 sec2 x
What will be an ideal response?
(tan x + 1)2 + (tan x - 1)2 = tan2x + 2 tan x + 1 + tan2x - 2 tan x + 1 = 2(tan2x + 1) = 2 sec2x
Mathematics
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Mathematics