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Calculus Level 5

Find the area of the region bounded by the x-axis and the curves defined by { y = t a n x , π 3 x π 3 y = c o t x , π 6 x 3. π 2 \begin{cases} y=tanx, ~~~ \frac{-\pi}{3} \leq x \leq \frac{\pi}{3} \\ y=cotx, ~~~ \frac{\pi}{6} \leq x \leq \frac{3.\pi}{2} \end{cases} If your answer comes out to be l o g ( λ ) log(\lambda) , then find the value of 1 λ \lceil \frac{1}{\lambda} \rceil

Note : . . \lceil .. \rceil denotes the Ceiling Function (Lowest integer greater than equal to).

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The answer is 1.

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1 solution

Humberto Bento
Nov 29, 2014

Both functions intersect at π 4 \frac{\pi }{4}

Therefore, the answer is:

A = 0 π 4 t g ( x ) d x + π 4 π 2 t g ( x ) d x = log ( 2 ) A=\int\limits_{0}^{\frac{\pi }{4}}{tg(x)dx}+\int\limits_{\frac{\pi }{4}}^{\frac{\pi }{2}}{tg(x)dx}=\log (2)

Therefore, the answer is 1

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