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  • Users: Arnoldjavs3
  • In Precalculus Mathematics Homework Help
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  1. A

    Converting standard to polar form

    Oh... right. I didn't know how to add the degree symbol with latex. I feel stupid now. How about the degree for ##z=-8i##? Am I right to think that it is 270o?
  2. A

    Converting standard to polar form

    Homework Statement you are given the standard form z = 3 - 3i Homework Equations The Attempt at a Solution so to convert this to polar form, i know that ##r = 3√2## but how do i find theta here? There are so many mixed answers it seems online that I can't tell... i know that ##(3,-3)## is in...
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    Unsure if this is a trig identity or calculus

    Just out of curiosity is trig identities something I should feel comfortable with? As far as math courses that I'm taking in my programs i believe I take up to calc3, linear algebra and discrete math
  4. A

    Unsure if this is a trig identity or calculus

    Sigh it's just annoying having to deal with something i did several years ago in a calculus course. I guess I should've remembered the basic factoring property. Anyway, $$sin^2x + cos^2x - 2sinxcosx = 1/9$$ and I think $$sin^2x + cos^2x = 1$$ so I believe it'll end up being after...
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    Unsure if this is a trig identity or calculus

    Homework Statement $$sinx - cosx = 1/3$$ solve for $$sin(2x)$$ Homework Equations $$sin^2x + cos^2x = 1$$ $$sin2x = 2cosxsinx$$ The Attempt at a Solution I think you can square both sides and get: $$sin^2x - cos^2x = 1/9$$ But how can I use this information to solve for sin2x? Is there a...
  6. A

    Trig identities (I think?) for precalc review

    Yeah, it was 2/7. Not sure why they turned the way they did when I had copy pasted them
  7. A

    Trig identities (I think?) for precalc review

    It was meant to be sinx = 1/5. I've solved all the original question, they were a bit easier than I had imagined. Should I still post the solutions or can I mark this question as solved and move on?
  8. A

    Trig identities (I think?) for precalc review

    Homework Statement My calc class is having me review precalc(which I'm really rusty on...) 21. Find sin θ, sec θ, and cot θ if tan θ = 27 22. Find sin θ, cos θ, and sec θ if cot θ = 4. 23. Find cos 2θ if sin θ = 15 24. Find sin 2θ and cos 2θ if tan θ = √2 25. Find cos θ and tan θ if sin θ =...
  9. A

    Questions about probability (successive attempts?)

    Yes you would have to restart if you fail on your first attempt on trial 2. Your 9 lives continue from trial 1. And let's say I'm on the third trial - however, the 'gamemaster' decides to let me have 2 shots at trying to win trial 3 rather than having me restart. This would increase the joint...
  10. A

    Questions about probability (successive attempts?)

    Yes I believe that you have the right idea here. So if you fail at any instance, you have to restart. Once you have used up your 15 attempts, you lose. So in essence, if allowed a second attempt at the same trial(just for the sake of understanding) then essentially the joint probability is...
  11. A

    Questions about probability (successive attempts?)

    Well I will post it there as it seems I won't be receiving much interest And his argument was that the events in sequence have no relevance to each other.
  12. A

    Questions about probability (successive attempts?)

    I guess not? It's simply for my learning experience though. Yes, one was attempting to argue that the probability of success of winning all 3 trials was the same as winning 1 of them.
  13. A

    Questions about probability (successive attempts?)

    Homework Statement I have another thread where there's a game similar to this one(however simpler to some degree) and I learned quite a bit from it. However, my neighbor had designed a game when he was in university for a project, and I would like to understand a bit more about it. . Basically...
  14. A

    Probability question for succession?

    So that would be around 40 correct? I had gotten a .108 as the answer to the expression you had given, and that yields a 89% of failing one attempt. So of which around 40 tries would have been sufficient? I have a much more complicated game that I'd like to ask how to accurately formulate...
  15. A

    Probability question for succession?

    Right, I'd like to find the minimum amount of players required to essentially have a 99% of one of them winning the game. But just for the sake of rules here, if no one wins then those two trials then that's that. I re-read my original post and I can see why it's a little confusing here. I'll...
  16. A

    Probability question for succession?

    I apologize for the lack of responses here on my part, I waas quite busy with school work. If you don't mind bringing this topic back up, I would like to clarify some things. You're right about me not explaining well here. Originally I had the game set up where you could try endlessly until you...
  17. A

    Probability question for succession?

    This is extremely helpful. Knowing more information about the trials is actually interesting, because I was thinking a bit further on how the markov model may be needed more. I was thinking about adding another element to this game that might make things a little more complicated. Let's say...
  18. A

    Probability question for succession?

    I'm doing a bit of research on Markov's model as of the moment, I'm trying to understand it through some youtube videos and I can see where it branches off. However the method mentioned above seems to be very straight to the point. So... it would take about 63 attempts to actually succeed all 3...
  19. A

    Probability question for succession?

    Right now what I want to figure out is the most optimal way of winning all three tries with the least amount of attempts. However, there are no outside factors influencing success and failure, they are merely chances predetermined. That is why I am trying to figure out how many attempts it would...
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    Probability question for succession?

    I'm all ears for learning this, however, I have no background in any form for probability. I'd be surprised if any of this was not alienated to me. Just a question though, using this more complex model, i imagine there would be a more accurate answer obtained in comparison to the methods used above?
  21. A

    Probability question for succession?

    Okay thank you guys so much! Alot easier than i had thought.
  22. A

    Probability question for succession?

    Homework Statement This isn't a homework question really... it's just something I'm not sure how to tackle. Say you have a 44% chance of being successful on one try, and then another 44% to succeed on your second try, and then a 36% to succeed on your final try. If you fail once at any...
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