Question 31

Mathematics Area Hard

The area of the region bounded by the \(x\)-axis and the curves defined by \(y = \tan x, \; -\frac{\pi}{3} \leq x \leq \frac{\pi}{3}\), \(y = \cot x, \; \frac{\pi}{6} \leq x \leq \frac{\pi}{2}\), is:

(A) \(-\frac{1}{2} log2\)
(B) \(\frac{1}{2} log2\)
(C) \(log2\)
(D) None of these
✓ Correct Answer: Option C Verified Solution

📘 Step-by-Step Solution & Detailed Explanation:

Both the curves intersect at \(x = \frac{\pi}{4}\), and the enclosed region is denoted as **ACBDA**. Hence, the area of the enclosed region is: \[ \int_0^{\frac{\pi}{4}} \tan x \, dx + \int_{\frac{\pi}{4}}^{\frac{\pi}{2}} \cot x \, dx \] This simplifies to: \[ = \left[ \log \sec x \right]_0^{\pi/4} + \left[ \log \sin x \right]_{\pi/4}^{\pi/2} \] Substitute the limits of integration: \[ = \left[ \log \sqrt{2} - \log 1 \right] + \left[ \log 1 - \log \frac{1}{\sqrt{2}} \right] \] Combine the terms: \[ = \log 2 \]

Solution Explanation Image

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