d/dx [tan^(-1){sec x+ tan x}]
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Heya
____________________________
d/dx Tan-¹ Tan { π/4 + x/2 }
=>
d/dx { π/4 + x/2 }
=>
x/4
____________________________
d/dx Tan-¹ Tan { π/4 + x/2 }
=>
d/dx { π/4 + x/2 }
=>
x/4
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