NCERT Class 11-Math's: Exemplar Chapter 3 Trigonometric Functions Part 4

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

Download PDF of This Page (Size: 163K)

Question 5:

Find the value of

Answer:

We have

(1)

Also

(2)

Similarly, (3)

Using (2) and (3) in (1), we get

Question 6:

Prove that

Answer:

We have

Question 7:

Solve the equation

Answer:

We have

Or

Or

Or

Or

When

When

Which gives

All these values of are contained in . Hence, the required solution set is given by

Question 8:

Solve

Answer:

Here,

Which gives

If we take

Again, if we take

Therefore, the possible solutions of above equations are

Long Answer Type

Question 9:

Find the value of

Answer:

Write

Developed by: