1.

Value after differentiating cos (x2+5) is ________

A. 5.sin (x<sup>2</sup>+5)
B. -sin (x<sup>2</sup>+5).2x
C. sin (x<sup>2</sup>+5).2x
D. cos (x<sup>2</sup>+5).2x
Answer» C. sin (x<sup>2</sup>+5).2x


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