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anonymous

  • 5 years ago

find the complx? 12+5i

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  1. amistre64
    • 5 years ago
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    find it?

  2. anonymous
    • 5 years ago
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    complex what? part? if complex part of the number - it's number in a front of i, so complex part=5

  3. amistre64
    • 5 years ago
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    real + imaginary maybe? 12 + 5i ; 5i is the imaginary part

  4. anonymous
    • 5 years ago
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    right!

  5. anonymous
    • 5 years ago
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    first we can find the modulus. and the find . Arg angle .. by using tan inverse (y\x)

  6. anonymous
    • 5 years ago
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    confused... what is the actual problem?

  7. amistre64
    • 5 years ago
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    teh modulus is the length of the line right? sqrt(144+25) = 13

  8. amistre64
    • 5 years ago
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    the angle is that of tan^-1(5/12) i spose

  9. amistre64
    • 5 years ago
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    if we plot this on reals; it would look like (12,5)

  10. anonymous
    • 5 years ago
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    its right. but agter we can use formula. r(cos angle + i sin angle)

  11. amistre64
    • 5 years ago
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    r(cos(t) + i sin(t)) is the polar coordinates...yes :) where r = 13 and t = that angle of tan^-1(5/12)

  12. amistre64
    • 5 years ago
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    t = 22.62 or so...

  13. anonymous
    • 5 years ago
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    is the ans 119

  14. anonymous
    • 5 years ago
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    how which formula to use? to find

  15. anonymous
    • 5 years ago
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    do (12+5i)(12-5i) 144-25[i^{2}\] 169 is the ans

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