Tính đạo hàm của hàm số $y=tan \frac{x+1}{2}$

Question

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4 câu trả lời

Answer 1

$y'=-\frac{1}{cos^{2}\frac{x+1}{2}}$

Answer 2

$y'=-\frac{1}{2cos^{2}\frac{x+1}{2}}$

Answer 3

$y'=\frac{1}{cos^{2}\frac{x+1}{2}}$

Answer 4

$y'=\frac{1}{2cos^{2}\frac{x+1}{2}}$