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manojbalaji1

  • 3 years ago

if x and y are two real quantities, then show that the equation cosy= x + 1/x is impossible.

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  1. shivam_bhalla
    • 3 years ago
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    Simply because -1<= cosx <=1

  2. shivam_bhalla
    • 3 years ago
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    x--> any variable :) In your case,it's y

  3. kevinkeegan
    • 3 years ago
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    |dw:1336390482629:dw||dw:1336390511645:dw|

  4. shivam_bhalla
    • 3 years ago
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    Take LCM of x+ 1/x and you will see that cosy is always greater than 1

  5. shivam_bhalla
    • 3 years ago
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    or lesser than -1

  6. UnkleRhaukus
    • 3 years ago
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    what if both x and y are complex/

  7. him1618
    • 3 years ago
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    use AM>GM

  8. him1618
    • 3 years ago
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    ull get x+ 1/x > 2

  9. him1618
    • 3 years ago
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    and cos y <=1

  10. him1618
    • 3 years ago
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    so they can ne ver be equated

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