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Inverse Trigonometric Functions · Question 8

JEE Main 2026 (Online) 24th January Evening ShiftMCQMedium📈 Topic in 13% papers+4−1
1

If the domain of the function f(x) = -1 ( 1x2 - 2x - 2 ) is (- , ] [ , ] [ , ), then + + + is equal to

  1. 4
  2. 2
  3. 5
  4. 3

Answer

(1) 4

Solution

For -1t to be defined, -1 t 1.

Let g(x) = x2 - 2x - 2 = (x - 1)2 - 3.

-1 1g(x) 1 |g(x)| 1 (and g(x) 0)

Case 1: g(x) 1

(x - 1)2 4

x -1 or x 3

Case 2: g(x) -1

(x - 1)2 2

1 - 2 x 1 + 2

Domain = (- , -1] [1 - 2, 1 + 2] [3, )

= -1, = 1 - 2, = 1 + 2, = 3

+ + + = -1 + 2 + 3 = 4

Answer: (1)

JEE Main 2026 (Online) 24th January Evening Shift

Keep practising — Inverse Trigonometric Functions

2

The number of solutions of -1 4x + -1 6x = 6, where - 12 6 < x < 12 6, is equal to :

  1. 2
  2. 0
  3. 3
  4. 1
JEE Main 2026 (Online) 22nd January Morning Shift
3

If the domain of the function f(x) = -1 ( 2x - 511 - 3x ) + -1(2x2 - 3x + 1) is the interval [ , ], then + 2 is equal to :

  1. 5
  2. 2
  3. 3
  4. 1
JEE Main 2026 (Online) 21st January Morning Shift
4

Let the maximum value of ( -1x )2 + ( -1x )2 for x [- 32, 1 2 ] be mn 2, where (m, n) = 1. Then m + n is equal to .

JEE Main 2026 (Online) 21st January Evening Shift
5

The value of -1 ( 1+ 2(2)-1 (2) ) - -1 ( 1+ 2 ( 12 )+1 ( 12 ) ) is equal to

  1. - 32
  2. + 52
  3. - 54
  4. + 32
JEE Main 2025 (Online) 8th April Evening Shift
6

Considering the principal values of the inverse trigonometric functions, -1 ( 32x + 12 1 - x2 ), - 12 < x < 1 2, is equal to

  1. -5 6 - -1x
  2. 5 6 - -1x
  3. 6 + -1x
  4. 4 + -1x
JEE Main 2025 (Online) 4th April Morning Shift
7

The sum of the infinite series -1 ( 74 )+ -1 ( 194 )+ -1 ( 394 )+ -1 ( 674 )+ is :

  1. 2+ -1 ( 12 )
  2. 2- -1 ( 12 )
  3. 2- -1 ( 12 )
  4. 2+ -1 ( 12 )
JEE Main 2025 (Online) 4th April Evening Shift
8

If y = ( 3 + -1 x2 ), then (x - y)2 + 3y2 is equal to .

JEE Main 2025 (Online) 2nd April Evening Shift
9

Let S = \x : -1x = + -1x + -1(2x + 1) \. Then x S(2x - 1)2 is equal to .

JEE Main 2025 (Online) 29th January Morning Shift
10

( -1 35 + -1 513 + -1 3365 ) is equal to:

  1. 3365
  2. 1
  3. 3265
  4. 0
JEE Main 2025 (Online) 28th January Morning Shift
11

Let [x] denote the greatest integer less than or equal to x. Then the domain of f(x) = -1(2[x] + 1) is:

  1. (- , )
  2. (- , ) - \0\
  3. (- , -1] [0, )
  4. (- , -1] [1, )
JEE Main 2025 (Online) 28th January Evening Shift

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