1
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The integral
$$\int\limits_{{\pi \over 6}}^{{\pi \over 3}} {{{\tan }^3}x.{{\sin }^2}3x\left( {2{{\sec }^2}x.{{\sin }^2}3x + 3\tan x.\sin 6x} \right)dx} $$
is equal to:
A
$$ - {1 \over {9}}$$
B
$$ - {1 \over {18}}$$
C
$$ {7 \over {18}}$$
D
$${9 \over 2}$$
2
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In a game two players A and B take turns in throwing a pair of fair dice starting with player A and total of scores on the two dice, in each throw is noted. A wins the game if he throws total a of 6 before B throws a total of 7 and B wins the game if he throws a total of 7 before A throws a total of six. The game stops as soon as either of the players wins. The probability of A winning the game is :
A
$${5 \over {6}}$$
B
$${5 \over {31}}$$
C
$${31 \over {61}}$$
D
$${30 \over {61}}$$
3
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The area (in sq. units) of the largest rectangle ABCD whose vertices A and B lie on the x-axis and vertices C and D lie on the parabola, y = x2–1 below the x-axis, is :
A
$${1 \over {3\sqrt 3 }}$$
B
$${2 \over {3\sqrt 3 }}$$
C
$${4 \over {3\sqrt 3 }}$$
D
$${4 \over 3}$$
4
JEE Main 2020 (Online) 4th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The minimum value of 2sinx + 2cosx is :
A
$${2^{-1 + \sqrt 2 }}$$
B
$${2^{1 - {1 \over {\sqrt 2 }}}}$$
C
$${2^{1 - \sqrt 2 }}$$
D
$${2^{-1 + {1 \over {\sqrt 2 }}}}$$
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