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aaronq

  • one year ago

what does tan2x equal when, x=-60 degrees?

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  1. max0236
    • one year ago
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    2*-60 is 120 so cos(-120) = \[\frac{ 1 }{ 2 }\] and sin(-120) = \[\frac{ -\sqrt{3} }{ 2 }\] tan is opp/adj which will then give you an exact answer of \[\sqrt{3}\]

  2. max0236
    • one year ago
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    tan = sin/cos

  3. aaronq
    • one year ago
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    thanks so much, i wasn't sure if i could just multiply 2 by 60, or if i had to use the identity 2tanx/1-tan^2x

  4. max0236
    • one year ago
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    as long as the 2 and x are together you are fine tan(2x)

  5. aaronq
    • one year ago
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    what if it's tan2x? it didn't necessarily specify tan(2x)

  6. max0236
    • one year ago
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    That is fine also if the 2 was outside for example 2tan(x) then it would be different

  7. aaronq
    • one year ago
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    ok sweet, thanks (Y)

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