# NCERT Class 11-Math's: Chapter –3 Trigonometric Functions Part 17

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**Question 48:**

The value of is

(A)

(B)

(C)

(D)

**Answer: (C)**

**Question 49:**

The value of is equal to

(A)

(B)

(C)

(D)

**Answer: (B)**

**Question 50:**

If , then the value of sin 2θ is equal to

(A)

(B)

(C)

(D)

**Answer: (C)**

**Question 51:**

If then the value of is

(A)

(B)

(C)

(D) Not defined

**Answer: (B)**

**Question 52:**

If lies in third quadrant then the value of is

(A)

(B)

(C)

(D)

**Answer: (C)**

**Question 53:**

Number of solutions of the equation lying in the interval is

(A)

(B)

(C)

(D)

**Answer: (C)**

**Question 54:**

The value of is given by

(A)

(B)

(C)

(D)

**Answer: (A)**

**Question 55:**

If A lies in the second quadrant and , then the value of is equal to

(A)

(B)

(C)

(D)

**Answer: (B)**

**Question 56:**

The value of is

(A)

(B)

(C)

(D)

**Answer: (A)**