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  Answer the following Questions. Question 1. Explain in brief the role of animal husbandry in human welfare. Solution : Animal husbandry deals with the scientific management of livestock. It includes various aspects such as feeding, breeding, and control diseases to raise the population of animal livestock. Animal husbandry usually includes animals such as cattle, pig, sheep, poultry, and fish which are useful for humans in various ways. These animals are managed for the production of commercially important products such as milk, meat, wool, egg, honey, silk, etc. The increase in human population has increased the demand of these products. Hence, it is necessary to improve the management of livestock scientifically.  Question 2. If your family owned a dairy farm, what measures would you undertake to improve the quality and quantity of milk production? Solution : Dairy farm management deals with processes which aim at improving the quality and quantity of milk production. Mi...

  Solve The Following Questions. Evaluate the following determinants in Exercise 1 and 2. Question 1.  Solution :   =  2(-1) - 4(-5) = -2 + 20  = 18 Question 2. (i)  (ii)  Solution : (i)  = (cosθ)(cosθ) - (-sinθ) (sinθ)=  cos 2  θ + sin 2  θ= 1 (ii)  = ( x 2  −  x  + 1)( x  + 1) − ( x  − 1)( x  + 1) =  x 3  −  x 2  +  x  +  x 2  −  x  + 1 − ( x 2  − 1) =  x 3  + 1 −  x 2  + 1 =  x 3  −  x 2  + 2 Question 3. If A =   then show that |2A| = 4|A| Solution : Given: A =   then 2A =  2 x  Hence, proved. Question 4.  If A =   then show that 3|A| = 27|A| Solution : Given: A =   then 3A = 3 It can be observed that in the first column, two entries are zero. Thus, we expand along the first column (C 1 ) for easier calculation.   Hence, proved. Question 5. ...