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anonymous

  • one year ago

Given sin(x)=-3/5 and x is in quadrant 3, what is the value of tan(x/2)?

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  1. anonymous
    • one year ago
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    draw a triangle to find the third side, or remember the mother of all right triangles 3- 4 - 5

  2. anonymous
    • one year ago
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    |dw:1441071122370:dw|

  3. anonymous
    • one year ago
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    then use the half angle formula to find \[\tan(\frac{x}{2})\]

  4. anonymous
    • one year ago
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    how do you use the half angle formula

  5. anonymous
    • one year ago
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    idk look it up

  6. anonymous
    • one year ago
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    http://pcb4w11.blogspot.com/2010/12/power-reducing-half-angle-formulas.html

  7. bradely
    • one year ago
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    tan(x/2) = sinx/(1+cosx) sinx = -3/5 and cos -4/5 Substitute find tan x/2 Source: mathskey.com

  8. anonymous
    • one year ago
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    so is the answer -3

  9. bradely
    • one year ago
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    correct

  10. anonymous
    • one year ago
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    thx for the help!!!

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