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Maths Definite Integral and Area Under Curves General Subjective Type

Published on: August 12, 2026

Evaluate: dx

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The correct answer is:

CHECK THE SOLUTION.

Sol. Let

I = dx ...(i)

Then,

I = dx

⇒ I = dx ... (ii)

Adding (i) and (ii), we get

2I = π dx

= 2I = π

⇒ 2I = – π , where t = cos x

⇒ 2I = – π = – =

⇒ I =

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