CBSE - Trigonometry

1 Trigonometry 

If sinq = 4 /  5 , then value of cos 2q is

1) 8 / 5
2) 3 / 5
3) 7 / 35
4) -7 / 25

2 Trigonometry 

(1 + tanθ + secθ) (θ+ cotθ – cosecθ) is equal to :

(1) 0  
(2) 2 
(3) 1 
(4) –1

3 Trigonometry 

If then the value of θ is:

(1) 60° 
(2) 30° 
(3) 90° 
(4) 45°

4 Trigonometry 

If A,B are acute angle and sinA = cosB, then the value of A + B =? 

1) 30°
2) 60°
3) 90°
4) 70°

5 Trigonometry 

The least value of   is

1) 4
2) 2Ö2
3) 2
4) Ö2

6 Trigonometry 

 If  2x  = secq =  and  2 / x  = tanq, then find the value of   2(x²-1/ x²)

1) 0
2) 1
3) 2
4) 3

7 Trigonometry 

If sinx + cosecx = 2, then (sin¹⁰x + cosec¹⁰x) is equal to:

(1) 3 
(2) 0
(3) 1 
(4) 2

8 Trigonometry 

If sinθ – cosθ = √2sin(90°– θ) , then tanθ = 

(1) √2 – 1    
(2) √2    
(3) 1–√2    
(4) √2 +1

9 Trigonometry 

If tanθ  = -1 then find the value of  secθ + cosecθ / cosθ - sinθ

1) 0
2) 1
3) -Ö2
4) Ö2

10 Trigonometry 

If sin²A + sin⁴A = 1, the value of tan²A – tan⁴A is 

1) -1
2) 1
3) 0
4) 2