d ⁄dx (sin-1x + 2cos x - 1) = ?

Mathematics » Trigonometry

d ⁄dx (sin-¹x + 2cos x - 1) = ?

A

$\frac{1}{\sqrt{x^{2} + 1}} - 2 s i n x$

B

$\frac{1}{\sqrt{x^{2} - 1}} + 2 s i n x$

C

$\frac{1}{\sqrt{1 - x^{2}}} - 2 s i n x$

D

$\frac{1}{\sqrt{1 - x^{2}}} + 2 s i n x$