Q26 of 45 Page 1

Prove that:


OR


Evaluate: as a limit of a sum.

Given;







Let (sin x - cos x) = t


⇒ (sin x + cos x )dx = dt


⇒When x = 0


⇒ t = 0 - 1


= - 1








= RHS


Hence Proved


OR


Given;


Here f(x) = 2x2+ 5x and a = 1, b = 3.



⇒ nh = 2;


i.e n→ ∞ ⇔ h→ 0













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