Correct Answer: D. Mineral workings and transportation

Correct Answer: C. tropical desert

Correct Answer: C. carelessly exposing your vital and personal information

Explanation

(a)

From \(\Delta\) AMC, \(\sin 60° = \frac{\sqrt{3}}{2}\)

\(\cos 30° = \frac{\sqrt{3}}{2}\)

\(\tan 60° = \frac{\sqrt{3}}{1} = \sqrt{3}\)

Hence, \(\frac{2 \tan 60° + \cos 30°}{\sin 60} = \frac{2 \times \sqrt{3} + \frac{\sqrt{3}}{2}}{\frac{\sqrt{3}}{2}}\)

= \(\frac{4\sqrt{3} + \sqrt{3}}{2} \div \frac{\sqrt{3}}{2}\)

= \(\frac{5\sqrt{3}}{2} \times \frac{2}{\sqrt{3}} = 5\)

(b)

In \(\Delta\) POT, \(\tan 36° = \frac{|TO|}{1050}\)

\(|OT| = 1050 \tan 36° = 1050 \times 0.7265\)

= 762.87m

In \(\Delta\) POB, \(\tan 41° = \frac{|OB|}{1050}\)

\(|OB| = 1050 \tan 41° = 1050 \times 0.8693\)

= 912.751m

\(|TB| = 912.751m - 762.87m = 149.88m\)

Hence, the height of the control tower = 150 m (to the nearest meter).

(ii) In \(\Delta\) POB, \(\cos 41° = \frac{1050}{|PB|}\)

\(|PB| = \frac{1050}{\cos 41°} = \frac{1050}{0.7547}\)

= 1,391.28m

The shortest distance between the aeroplane and the base of the control tower = 1,391m (to the nearest metre).

Correct Answer: C. 60°

Correct Answer: A. Primary sector

Explanation

Primary sector or extractive occupations include farming, fishing, mining etc workers here form about 65 percent.

Correct Answer: A. Stationary

Correct Answer: C. brother

Correct Answer: B. pathogens

Correct Answer: D. Loi cadre

Explanation

The loi-cadre ( Reform Act) was a French legal reform passed by the French National Assembly on 23 June 1956. It marked a turning point in relations between France and its overseas empire. Under pressure from independence movements in the colonies, the government transferred a number of powers from Paris to elected territorial governments in French African colonies and also removed remaining voting inequalities by implementing universal suffrage and abolishing the multiple electoral college system.