For the following questions answer them individually
Evaluate: $$ \left(\frac{ sin 47^\circ } {cos 43^\circ}\right)^2  + \left(\frac{ cos 43^\circ } {sin 47^\circ}\right)^2 - 4cos^2 45^\circ  $$
Pooja's age 4 years back and Deepa's age after 4 years are equal. The ratio of Pooja's age 4 years hence and Deepa's age 4 years before is 3 : 1. What is the ratio of their present ages?
Vijayan started walking towards south. After walking 15 m, he turned left and walked 15 m. He again turned left and walked 15 m. How far and in which direction is he from his starting point?
If 'sti nro kti' stands for 'clouds pour down', 'nro bsi mit' stands for 'down he goes', and 'bsi nro zpi' stands for 'died down he', which word would mean 'goes'?