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Inverse Trigonometric Functions · Question 18

JEE Main 2025 (Online) 28th January Evening ShiftMCQEasy📈 Topic in 13% papers+4−1
1

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, )

Answer

(1) (- , )

Solution

-1t is defined for |t| 1, i.e. t -1 or t 1.

2[x] + 1 1 [x] 0 x 0

2[x] + 1 -1 [x] -1 x < 0

Domain = (- , 0) [0, ) = (- , )

(Indeed, 2[x] + 1 is always an odd integer, so |2[x] + 1| 1 for every real x.)

Answer: (1)

JEE Main 2025 (Online) 28th January Evening Shift

Keep practising — Inverse Trigonometric Functions

2

Let =3 -1 ( 611 ) and =3 -1 ( 49 ), where inverse trigonometric functions take only the principal values. Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
JEE Main 2026 (Online) 8th April Evening Shift
3

Let 0< <1, = 13 and -1(1- )+ -1(1- )= 4. Then 6( + ) is equal to :

  1. 6
  2. 7
  3. 8
  4. 9
JEE Main 2026 (Online) 6th April Morning Shift
4

If ( -1 (x 2 ) )= ( -1 1-x2 ), x (0, 1), then the value of x is :

  1. 12
  2. 13
  3. 23
  4. 58
JEE Main 2026 (Online) 6th April Evening Shift
5

If 4+ p=111 -1 ( 2p-11+22p-1 )= , then is equal to .

JEE Main 2026 (Online) 5th April Morning Shift
6

Let [ ] denote the greatest integer function. If the domain of the function f(x)= -1 ( 4x+2[x]3 ) is [ , ], then 12( + ) is equal to :

  1. 6
  2. 8
  3. 9
  4. 4
JEE Main 2026 (Online) 4th April Morning Shift
7

If k = ( 4 + 12 -1 ( 23 ) ) + ( 12 -1 ( 23 ) ), then the number of solutions of the equation -1(kx - 1) = -1x - -1x is .

JEE Main 2026 (Online) 28th January Morning Shift
8

Considering the principal values of inverse trigonometric functions, the value of the expression (2 -1 ( 2 13 ) - 2 -1 ( 3 10 ) ) is equal to :

  1. 3356
  2. - 3356
  3. - 1663
  4. 1663
JEE Main 2026 (Online) 28th January Evening Shift
9

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
JEE Main 2026 (Online) 24th January Evening Shift
10

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
11

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

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