If cos 62° 40' = x, the value of 1 + sin² 27° 20' is :

1. 1 + x²

2. 1 - x²

3. x² - 1

4. 1 + x

sin θ = 0.5 implies tan θ + cot θ is equal to :

1. 2 : $\sqrt{3}$

2. $\sqrt{3}$ : 4

3. 4 : $\sqrt{3}$

4. $\sqrt{3}$ : 2

Use tables to find sine of :

(i) 21°

(ii) 34° 42'

(iii) 47° 32'

(iv) 62° 57'

Use tables to find cosine of :

(i) 2° 4'

(ii) 8° 12'

(iii) 26° 32'

(iv) 65° 41'