- How many times are the hands of a clock at right angle in a day ?

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Q):Find a second solution of the differential equation x*2.y"-xy'+2y=0; Y1=xsin(inx)
by using the formula.? Why is the skin and hair so soft compared to the nail? even though they are all synthesized through keratin and mostly similar factors? If 425 mL of sodium chloride is present in 5 L of solution, what is the percentage by volume of sodium chloride? How do I solve 30sin^2x=30+15cosx? Same point excluding start and finish?