1
GATE CSE 2014 Set 1
MCQ (Single Correct Answer)
+1
-0.3
Let the function
$$f\left( \theta \right) = \left| {\matrix{ {\sin \,\theta } & {\cos \,\theta } & {\tan \,\theta } \cr {\sin \left( {{\pi \over 6}} \right)} & {\cos \left( {{\pi \over 6}} \right)} & {\tan \left( {{\pi \over 6}} \right)} \cr {\sin \left( {{\pi \over 3}} \right)} & {\cos \left( {{\pi \over 3}} \right)} & {\tan \left( {{\pi \over 3}} \right)} \cr } } \right|$$

Where $$\theta \in \left[ {{\pi \over 6},{\pi \over 3}} \right]$$ and $$f\left( \theta \right)$$ denote the derivative of $$f$$ with repect to $$\theta $$. Which of the following statements is/are TRUE?

$${\rm I})$$ There exists $$\theta \in \left[ {{\pi \over 6},{\pi \over 3}} \right]$$ such that $$f\left( \theta \right)$$ $$= 0$$.
$${\rm I}{\rm I})$$ There exists $$\theta \in \left[ {{\pi \over 6},{\pi \over 3}} \right]$$ such that $$f\left( \theta \right)$$ $$ \ne 0$$.

A
$${\rm I}$$ only
B
$${\rm I}$$$${\rm I}$$ only
C
Both $${\rm I}$$ and $${\rm I}$$$${\rm I}$$
D
neither $${\rm I}$$ nor $${\rm I}$$$${\rm I}$$
2
GATE CSE 2013
MCQ (Single Correct Answer)
+1
-0.3
Function $$f$$ is known at the following points: GATE CSE 2013 Discrete Mathematics - Calculus Question 30 English

The value of $$\int\limits_0^3 {f\left( x \right)dx} $$ computed using the trapezoidal rule is

A
$$8.983$$
B
$$9.003$$
C
$$9.017$$
D
$$9.045$$
3
GATE CSE 2013
MCQ (Single Correct Answer)
+1
-0.3
Which one of the following functions is continuous at $$x=3?$$
A
$$f\left( x \right) = \left\{ {\matrix{ {2,} & {if} & {x = 3} \cr {x - 1} & {if} & {x > 3} \cr {{{x + 3} \over 3},} & {if} & {x < 3} \cr } } \right.$$
B
$$f\left( x \right) = \left\{ {\matrix{ {4,} & {if} & {x = 3} \cr {8 - x} & {if} & {x \ne 3} \cr } } \right.$$
C
$$f\left( x \right) = \left\{ {\matrix{ {x + 3,} & {if} & {x \le 3} \cr {x - 4} & {if} & {x > 3} \cr } } \right.$$
D
$$f\left( x \right) = {1 \over {{x^3} - 27}},\,if\,\,x \ne 3$$
4
GATE CSE 2012
MCQ (Single Correct Answer)
+1
-0.3
Consider the function $$f\left( x \right) = \sin \left( x \right)$$ in the interval $$x \in \left[ {\pi /4,\,\,7\pi /4} \right].$$ The number and location(s) of the local minima of this function are
A
One, at $$\pi /2$$
B
One, at $$3\pi /2$$
C
Two, at $$\pi /2$$ and $$3\pi /2$$
D
Two, at $$\pi /4$$ and $$3\pi /2$$
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