NCERT Solutions for Class 12 Maths Chapter 2 Inverse Trigonometric Functions Ex 2.2 are part of NCERT Solutions for Class 12 Maths. Here we have given NCERT Solutions for Class 12 Maths Chapter 2 Inverse Trigonometric Functions Ex 2.2.

Board |
CBSE |

Textbook |
NCERT |

Class |
Class 12 |

Subject |
Maths |

Chapter |
Chapter 2 |

Chapter Name |
Inverse Trigonometric Functions |

Exercise |
Ex 2.2 |

Number of Questions Solved |
21 |

Category |
NCERT Solutions |

## NCERT Solutions for Class 12 Maths Chapter 2 Inverse Trigonometric Functions Ex 2.2

**Ex 2.2 Class 12 Maths Question 1.**

**Solution:**

Let sin^{-1} x = θ

sin θ = x sin 3θ = 3 sin θ – 4 sin³ θ

sin 3θ = 3x – 4x³

3θ = sin^{-1 }(3x – 4x³)

or

**Ex 2.2 Class 12 Maths Question 2.**

**Solution:**

Let cos^{-1} x = θ

x = cos θ

R.H.S= cos^{-1} (4x³ – 3cosx)

= cos^{-1} (4 cos³θ – 3 cosθ)

= cos^{-1} (cos 3θ) [∴ cos 3θ = 4 cos³ θ – 3 cos θ]

= 3θ

= 3 cos^{-1} x

= L.H.S.

**Ex 2.2 Class 12 Maths Question 3.**

**Solution:**

L.H.S =

=

=

= R.H.S

**Ex 2.2 Class 12 Maths Question 4.**

**Solution:**

L.H.S =

**Ex 2.2 Class 12 Maths Question 5.**

**Write the function in the simplest form**

**Solution:**

Putting x = θ

∴ θ = tan^{-1} x

**Ex 2.2 Class 12 Maths Question 6.**

**Solution:**

Given expression

Let x = secθ

**Ex 2.2 Class 12 Maths Question 7.**

**Solution:**

=

**Ex 2.2 Class 12 Maths Question 8.**

**Solution:**

Dividing numerator and denominator by cos x

**Ex 2.2 Class 12 Maths Question 9.**

**Solution:**

Let x = a sinθ

=> = sinθ

**Ex 2.2 Class 12 Maths Question 10.**

**Solution:**

Put x = a tanθ,

we get

**Ex 2.2 Class 12 Maths Question 11.**

**Find the value of the following**

**Solution:**

=

**Ex 2.2 Class 12 Maths Question 12.**

**cot[tan ^{-1} a + cot^{-1} a]**

**Solution:**

Given

cot[tan

^{-1}a + cot

^{-1}a]

=

**Ex 2.2 Class 12 Maths Question 13.**

**Solution:**

Putting x = tanθ

=> tan^{-1} x = θ

**Ex 2.2 Class 12 Maths Question 14.**

**If then find the value of x**

**Solution:**

**Ex 2.2 Class 12 Maths Question 15.**

**If then find the value of x**

**Solution:**

L.H.S

**Ex 2.2 Class 12 Maths Question 16.**

**Solution:**

=

=

**Ex 2.2 Class 12 Maths Question 17.**

**Solution:**

=

=

**Ex 2.2 Class 12 Maths Question 18.**

**Solution:**

Let

sinθ =

**Ex 2.2 Class 12 Maths Question 19.**

** is equal to**

**(a) **

**(b) **

**(c) **

**(d) **

**Solution:**

=

**Ex 2.2 Class 12 Maths Question 20.**

** is equal to**

**(a) **

**(b) **

**(c) **

**(d) 1**

**Solution:**

**Ex 2.2 Class 12 Maths Question 21.**

** is equal to**

**(a) π**

**(b) **

**(c) 0**

**(d) 2√3**

**Solution:**

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