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anonymous

  • one year ago

Which equation is not an identity? tan(–t) = –tan t tan t(csc t + cot t) = sec t + 1 sin tcot t = cos t cos2t − sin2t = –1

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  1. anonymous
    • one year ago
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    @Shalante @oldrin.bataku

  2. anonymous
    • one year ago
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    i feel like it is d but in like 50% sure

  3. anonymous
    • one year ago
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    @UsukiDoll

  4. UsukiDoll
    • one year ago
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    thinking...

  5. UsukiDoll
    • one year ago
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    I've seen \[\cos^2t-\sin^2t \] before. I think it was one of the identities for cos2t

  6. anonymous
    • one year ago
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    okay so d is right?

  7. UsukiDoll
    • one year ago
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    yeah... there's also another identity which is \[\large \cos^2t+\sin^2t=1 \] but rearranging them a bit gives me \[\large \cos^2t=1-\sin^2t \] \[\large \sin^2t=1-\cos^2t \]

  8. anonymous
    • one year ago
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    d was right lol this stuff is so confusing

  9. UsukiDoll
    • one year ago
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    |dw:1438846787051:dw|

  10. UsukiDoll
    • one year ago
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    one big huge trig list........and parts of it exist beyond trig.

  11. anonymous
    • one year ago
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    okay i posted another question do you think you could help me on that one as well?

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spraguer (Moderator)
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