Let $y = \cos \left( x ^ { 2 } - x + 1 \right)$ . Then $y ^ { \prime }$ is

A) $- \sin ( 2 x - 1 )$
B) $\sin ( 2 x - 1 )$
C) $( 2 x - 1 ) \sin \left( x ^ { 2 } - x + 1 \right)$
D) $- ( 2 x - 1 ) \sin \left( x ^ { 2 } - x + 1 \right)$
E) $- 2 x \sin \left( x ^ { 2 } - x + 1 \right)$

Question

Let $y = \cos \left( x ^ { 2 } - x + 1 \right)$ . Then $y ^ { \prime }$ is

A) $- \sin ( 2 x - 1 )$
B) $\sin ( 2 x - 1 )$
C) $( 2 x - 1 ) \sin \left( x ^ { 2 } - x + 1 \right)$
D) $- ( 2 x - 1 ) \sin \left( x ^ { 2 } - x + 1 \right)$
E) $- 2 x \sin \left( x ^ { 2 } - x + 1 \right)$

Quizplus · Accepted Answer

The Answer is D

Let y=cos⁡(x2−x+1)y = \cos \left( x ^ { 2 } - x + 1 \right)y=cos(x2−x+1)

Let $y = \cos \left( x ^ { 2 } - x + 1 \right)$