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Inverse Trigonometric Functions

JEE Main 2024 (Online) 31st January Morning ShiftMCQMedium📈 Topic in 21% papers+4−1
Ques. 1JEE Main 2024, 31 January (Morning Shift)

For , , 0, if -1 + -1 + -1 = and ( + + )( - + )=3 , then equals

  1. 3
  2. 32
  3. 1 2
  4. 3-12 2

Answer

(2) 32

Solution

Let -1 =A, -1 =B, -1 =C ⇒ A+B+C=

∵ each angle lies in [- 2, 2 ] and is non-zero, all three are positive ⇒ A, B, C are the angles of a triangle whose sides are ∝ A, B, C, i.e. ∝ , , (sine rule)

Given: ( + )2- 2=3 2+ 2- 2=

C= 2+ 2- 22 = 12 (cosine rule)

C= 3 = 3= 32

Answer: (2)

Keep practising — Inverse Trigonometric Functions

Ques. 2JEE Main 2024, 31 January (Evening Shift)

If a= -1( (5)) and b= -1( (5)), then a2+b2 is equal to

  1. 25
  2. 4 2+25
  3. 8 2-40 +50
  4. 4 2-20 +50
Ques. 3JEE Main 2024, 29 January (Evening Shift)

Let x= mn (m, n are co-prime natural numbers) be a solution of the equation (2 -1x )= 19 and let , ( > ) be the roots of the equation mx2-nx-m+n=0. Then the point ( , ) lies on the line

  1. 3x-2y=-2
  2. 3x+2y=2
  3. 5x+8y=9
  4. 5x-8y=-9
Ques. 4JEE Main 2024, 27 January (Evening Shift)

Considering only the principal values of inverse trigonometric functions, the number of positive real values of x satisfying -1(x)+ -1(2x)= 4 is :

  1. more than 2
  2. 2
  3. 0
  4. 1

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