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lim_(x rarr(pi)/(6))cot(x)=?
Choose 1 answer:
(A) 
(sqrt3)/(3)
(B) 
(sqrt3)/(2)
(C) 
sqrt3
(D) The limit doesn't exist.

limxπ6cot(x)=? \lim _{x \rightarrow \frac{\pi}{6}} \cot (x)=? \newlineChoose 11 answer:\newline(A) 33 \frac{\sqrt{3}}{3} \newline(B) 32 \frac{\sqrt{3}}{2} \newline(C) 3 \sqrt{3} \newline(D) The limit doesn't exist.

Full solution

Q. limxπ6cot(x)=? \lim _{x \rightarrow \frac{\pi}{6}} \cot (x)=? \newlineChoose 11 answer:\newline(A) 33 \frac{\sqrt{3}}{3} \newline(B) 32 \frac{\sqrt{3}}{2} \newline(C) 3 \sqrt{3} \newline(D) The limit doesn't exist.
  1. Definition of cotangent: To find the limit of cot(x)\cot(x) as xx approaches π6\frac{\pi}{6}, we need to understand the definition of cotangent. Cotangent is the reciprocal of the tangent function, so cot(x)=1tan(x)\cot(x) = \frac{1}{\tan(x)}.
  2. Finding tan(π6)\tan(\frac{\pi}{6}): We know that tan(π6)\tan(\frac{\pi}{6}) is equal to 33\frac{\sqrt{3}}{3} because tan(x)\tan(x) is the ratio of the opposite side to the adjacent side in a right-angled triangle, and for an angle of π6\frac{\pi}{6} (3030 degrees), this ratio is 33\frac{\sqrt{3}}{3}.
  3. Reciprocal of tan(π/6)\tan(\pi/6): Therefore, cot(π/6)\cot(\pi/6) is the reciprocal of tan(π/6)\tan(\pi/6), which means cot(π/6)=1/(3/3)\cot(\pi/6) = 1/(\sqrt{3}/3). To find this value, we multiply the numerator and denominator by 33 to get rid of the fraction in the denominator.
  4. Rationalizing the denominator: After simplifying, we get cot(π6)=33\cot(\frac{\pi}{6}) = \frac{3}{\sqrt{3}}. To rationalize the denominator, we multiply the numerator and denominator by 3\sqrt{3}.
  5. Simplifying cot(π/6)\cot(\pi/6): This gives us cot(π/6)=3333\cot(\pi/6) = \frac{3\sqrt{3}}{\sqrt{3}\sqrt{3}} which simplifies to cot(π/6)=333\cot(\pi/6) = \frac{3\sqrt{3}}{3}.
  6. Final result: After canceling out the 33 in the numerator and denominator, we are left with cot(π6)=3\cot(\frac{\pi}{6}) = \sqrt{3}.

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