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vera_ewing

  • one year ago

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  1. Nnesha
    • one year ago
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    let cos theta = x so replace all cos with x \[\huge\rm (x-x)^2+(x+x)^2\] now solve

  2. Nnesha
    • one year ago
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    how did you get D ?

  3. Nnesha
    • one year ago
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    try again... you don't have to use a calculator it's just like (2-2)^2+ (2+2)^2

  4. vera_ewing
    • one year ago
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    16?

  5. Nnesha
    • one year ago
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    do you mean (2-2)^2+(2+2)^2 = 16 ??

  6. vera_ewing
    • one year ago
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    Yeah

  7. Nnesha
    • one year ago
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    yeah right ...

  8. Nnesha
    • one year ago
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    \[\huge\rm \color{ReD}{(x-x)^2}+(x+x)^2\] now solve x-x= ?? x+x= ?? solve the parentheses

  9. vera_ewing
    • one year ago
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    x-x=0 x+x=2x

  10. Nnesha
    • one year ago
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    yes right \[\huge\rm \color{ReD}{(0)^2}+(2x)^2= ??\]

  11. vera_ewing
    • one year ago
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    2x(2x)=4x^2

  12. vera_ewing
    • one year ago
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    So the answer is B?

  13. Nnesha
    • one year ago
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    yes right now replace x with cos theta = answer

  14. vera_ewing
    • one year ago
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    Thank you!

  15. Nnesha
    • one year ago
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    my pleasure

  16. anonymous
    • one year ago
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    Hey Vera its me starlord6200

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