Maths-
General
Easy

Question

The area bounded by y equals sin to the power of negative 1 end exponent invisible function application blank x equals fraction numerator 1 over denominator square root of 2 end fraction and x-axis is

  1. open parentheses fraction numerator 1 over denominator square root of 2 end fraction plus 1 close parentheses blanksq unit    
  2. open parentheses 1 minus fraction numerator 1 over denominator square root of 2 end fraction close parentheses blanksq unit    
  3. fraction numerator pi over denominator 4 square root of 2 end fraction blank s q blank u n i t    
  4. open parentheses fraction numerator pi over denominator 4 square root of 2 end fraction plus fraction numerator 1 over denominator square root of 2 end fraction minus 1 close parentheses blanksq unit    

hintHint:

In this question we have to  y equals sin to the power of negative 1 end exponent open parentheses x close parentheses and the line is x equals fraction numerator 1 over denominator square root of 2 end fraction. We have to find the area bounded inside the point of intersection of these two curves and above the x-axis. We have to use ILATE to integrate I equals space u cross times integral v d x space minus space integral open parentheses fraction numerator d u over denominator d x end fraction cross times integral v d x close parentheses d x here u equals 1 comma space v space equals space sin to the power of negative 1 end exponent open parentheses x close parentheses. After integrating we put the limit x equals 0 space t o space x equals fraction numerator 1 over denominator square root of 2 end fraction

The correct answer is: open parentheses fraction numerator pi over denominator 4 square root of 2 end fraction plus fraction numerator 1 over denominator square root of 2 end fraction minus 1 close parentheses blanksq unit


    Green Curve y= arcsin(x) , Red line x=1/sqrt. 2
    In This figure the green curve is y equals sin to the power of negative 1 end exponent open parentheses x close parentheses and the red line is x equals fraction numerator 1 over denominator square root of 2 end fraction
    We have to find the area bounded inside the point of intersection of these two curves and above the x-axis
    The point of intersection is open parentheses fraction numerator 1 over denominator square root of 2 end fraction comma straight pi over 4 close parentheses
    The area will be equal to integral subscript 0 superscript fraction numerator 1 over denominator square root of 2 end fraction end superscript sin to the power of negative 1 end exponent open parentheses x close parentheses d x
    We know that for integration of sin to the power of negative 1 end exponent open parentheses x close parentheses we will use ILATE rule
    I space equals space integral 1 cross times sin to the power of negative 1 end exponent open parentheses x close parentheses  let u equals 1 comma space v space equals space sin to the power of negative 1 end exponent open parentheses x close parentheses
    I equals space u cross times integral v d x space minus space integral open parentheses fraction numerator d u over denominator d x end fraction cross times integral v d x close parentheses d x
    By substituting the values of u comma v in the above equation we get
    I space equals space x sin to the power of negative 1 end exponent open parentheses x close parentheses minus integral fraction numerator x over denominator square root of 1 minus x squared end root end fraction d x
    Let 1 minus x squared equals t squared
    => By differentiating both sides we get,
    => negative x d x equals t d t
    => I space equals space x sin to the power of negative 1 end exponent open parentheses x close parentheses minus integral t over t d t
    => I space equals space x sin to the power of negative 1 end exponent open parentheses x close parentheses minus t
    => I space equals space x sin to the power of negative 1 end exponent open parentheses x close parentheses minus square root of 1 minus x squared end root space plus c  where c is the constant of Integration.
    By putting the limits we get
    =>I space equals open square brackets space x sin to the power of negative 1 end exponent open parentheses x close parentheses minus square root of 1 minus x squared end root space plus c close square brackets subscript 0 superscript fraction numerator 1 over denominator square root of 2 end fraction end superscript
    =>open parentheses fraction numerator straight pi over denominator 4 square root of 2 end fraction plus fraction numerator 1 over denominator square root of 2 end fraction minus 1 close parentheses s q. space u n i t

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