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The acute angle made by the line joining the points left parenthesis 1 comma negative 3 , 2 right parenthesis and left parenthesis 3 comma negative 5 , 1 right parenthesis with the Y-axis is

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  1. c o s to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 2 over denominator 3 end fraction close parentheses    
  2. c o s to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 1 over denominator 3 end fraction close parentheses    
  3. c o s to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 2 over denominator 5 end fraction close parentheses    
  4. c o s to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 3 over denominator 5 end fraction close parentheses    

    Answer:The correct answer is: c o s to the power of negative 1 end exponent invisible function application open parentheses fraction numerator 2 over denominator 3 end fraction close parentheses

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    text  If  end text a with not stretchy bar on top equals ı with not stretchy bar on top plus 2 ȷ with not stretchy bar on top plus 3 k with not stretchy bar on top comma b with not stretchy bar on top equals negative ı with not stretchy bar on top plus 2 ȷ with not stretchy bar on top plus k with not stretchy bar on top comma c with not stretchy bar on top equals 3 ı with not stretchy bar on top plus ȷ with not stretchy bar on top text  and  end text a with not stretchy bar on top plus t b with not stretchy bar on top is perpendicular to stack c with ‾ on top, then t equals

    text  If  end text a with not stretchy bar on top equals ı with not stretchy bar on top plus 2 ȷ with not stretchy bar on top plus 3 k with not stretchy bar on top comma b with not stretchy bar on top equals negative ı with not stretchy bar on top plus 2 ȷ with not stretchy bar on top plus k with not stretchy bar on top comma c with not stretchy bar on top equals 3 ı with not stretchy bar on top plus ȷ with not stretchy bar on top text  and  end text a with not stretchy bar on top plus t b with not stretchy bar on top is perpendicular to stack c with ‾ on top, then t equals

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    If a with bar on top equals negative ı with bar on top plus ȷ with bar on top plus 2 k with bar on top comma b with bar on top equals 2 l with bar on top plus ȷ with bar on top minus k with bar on top comma c with bar on top equals negative 2 l with bar on top plus ȷ with bar on top plus 3 k with bar on top then the angle between 2 a with not stretchy bar on top minus c with not stretchy bar on top and  is

    If a with bar on top equals negative ı with bar on top plus ȷ with bar on top plus 2 k with bar on top comma b with bar on top equals 2 l with bar on top plus ȷ with bar on top minus k with bar on top comma c with bar on top equals negative 2 l with bar on top plus ȷ with bar on top plus 3 k with bar on top then the angle between 2 a with not stretchy bar on top minus c with not stretchy bar on top and  is

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    The mass of the earth is 6.00cross times 10 to the power of 24 Kg and that of the moon is 7.40cross times 10 to the power of 22 kg. The constant of gravitation  G=6.667cross times 10 negative 11 to the power of blankNm-2 kg--2.The potential energy of the system is -7.79cross times 10 to the power of 28 Joules. the mean distance between the earth and moon is =

    The mass of the earth is 6.00cross times 10 to the power of 24 Kg and that of the moon is 7.40cross times 10 to the power of 22 kg. The constant of gravitation  G=6.667cross times 10 negative 11 to the power of blankNm-2 kg--2.The potential energy of the system is -7.79cross times 10 to the power of 28 Joules. the mean distance between the earth and moon is =

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    A=b4 the fractional error in A is
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