# NCERT Class 11-Math's: Exemplar Chapter 3 Trigonometric Functions Part 8

Get top class preparation for IEO Class-3 right from your home: fully solved questions with step-by-step explanation- practice your way to success.

## Match Each Item Given under the Column C1 to Its Correct Answer Given under Column C2

Question 22:

 (a) (i) (b) (ii) (c) (iii) (d) (iv)

(a)

Hence (a) matches with (iv) denoted by

(b)

Hence (b) matches with (i) i.e.,

(c)

Hence (c) matches with (ii) i.e.,

(d)

Hence (d) matches with (iii), i.e., (d) ↔ (iii)

## 3.3 EXERCISE

Question 1:

To prove:

As equation on RHS is a simplified expression, so we must opt Left side equation and simplify it further so that we can get

LHS = RHS.

And thus we will be able to prove it.

The expression gives us hint that we use the identity:

to simplify the expression but to use this we need to multiply numerator and denominator with

.

Hence, it is proved that: