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anonymous

  • one year ago

find the domain of validity for each identity sin0(imagine the 0s has a line through it)+cos0/sin 0=1+cos0 Please explain I am totally lost on this I know that it is true but i don't know anything else is that all I need to know I am really confused please help!

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  1. LunyMoony
    • one year ago
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    I have no idea, sorry. Where's a math/trigonometry genius when you need them!

  2. anonymous
    • one year ago
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    I am really confused on this

  3. LunyMoony
    • one year ago
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    I did these once, but I sucked at them and I have no idea how I got through them

  4. Loser66
    • one year ago
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    \(sin(\theta)+\dfrac{cos(\theta)}{sin(\theta)}= 1+ cos (\theta)\), right?

  5. Loser66
    • one year ago
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    and we have to prove it, right?

  6. anonymous
    • one year ago
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    yep

  7. Loser66
    • one year ago
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    It is not identity, how to prove?? counterexample, \(\theta = \pi/6\)

  8. Loser66
    • one year ago
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    Left hand side: \(1/2+ \sqrt3=\dfrac{1+2\sqrt3}{2}\) Righ hand side :\(1+\sqrt3/2 =\dfrac{2+\sqrt3}{2}\)

  9. Loser66
    • one year ago
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    Hence \(LHS\neq RHS\)

  10. anonymous
    • one year ago
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    i am going to make a guess `

  11. anonymous
    • one year ago
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    no, i am not

  12. anonymous
    • one year ago
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    but i am almost certain there is a typo in the question

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