# NCERT Class 11-Math՚s: Exemplar Chapter 3 Trigonometric Functions Part 12 (For CBSE, ICSE, IAS, NET, NRA 2022)

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**Question 14**:

If then show

**Answer**:

Given,

To prove:

We know that:

As we must prove

d,

Hence,

**Question 15**:

If , then find the general value of .

**Answer**:

**Question 16**:

Find the most general value of satisfying the equation and

**Answer**:

**Question 17**:

If hen find the general value of .

**Answer**:

**Question 18**:

If then find the value of .

**Answer**:

**Question 19**:

If then find the value of

**Answer**: