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  • A
    apple2357 posted the thread Derivative of e^(kx) without using the Chain Rule in Calculus.
    Assuming we have established the derivative of e^x is e^x, can someone offer me an intuitive way of seeing why e^(kx) differentiates to...
  • K
    khansaheb reacted to Dr.Peterson's post in the thread Circles and Sine Waves with Like Like.
    We're low on moderators. Both are now visible. We're thinking of parametrizing the curve in terms of the angle (that is, rotating at...
  • Dr.Peterson
    Dr.Peterson replied to the thread Circles and Sine Waves.
    We're low on moderators. Both are now visible. We're thinking of parametrizing the curve in terms of the angle (that is, rotating at...
  • F
    fresh_42 replied to the thread Circles and Sine Waves.
    We can write the unit circle as \{(\cos x\, , \,\sin x)\,|\,0\le x\le 2\pi\}, the Archimedean spiral as \{(x\cdot \cos x\, , \,x\cdot...
  • B
    Billy_B replied to the thread Circles and Sine Waves.
    Thanks for both your responses and taking the time to explain it. And for the math calculator sites. The plotting function looks...
  • K
    khansaheb reacted to kurksai's post in the thread Circles and Sine Waves with Like Like.
    Hi Bill, and welcome to the forum! You are actually half right in your hypothesis! If you trace the vertical height (the y-axis) of a...
  • K
    kurksai replied to the thread Circles and Sine Waves.
    Hi Bill, and welcome to the forum! You are actually half right in your hypothesis! If you trace the vertical height (the y-axis) of a...
  • K
    khansaheb reacted to The Highlander's post in the thread Trigonometry problem with Like Like.
    With the sketch marked up the way I have done above, you might then see a more direct (& elegant?) way to determine the lengths of x &...
  • C
    chijioke reacted to The Highlander's post in the thread Trigonometry problem with Like Like.
    With the sketch marked up the way I have done above, you might then see a more direct (& elegant?) way to determine the lengths of x &...
  • B
    Billy_B replied to the thread Circles and Sine Waves.
    Thanks Dr Peterson for your answer and ref to GeoGebra. I’ll look for some Youtube tutorials. Reason for asking is: It’s an idea/theory...
  • Dr.Peterson
    Dr.Peterson replied to the thread Circles and Sine Waves.
    Of course it would not literally be a sine wave, since a sine wave has a fixed amplitude. It would be some variation, along the lines of...
  • The Highlander
    The Highlander replied to the thread areas in regular octagon.
    So am I but that's not a problem either because you can teach an old dog new tricks! 😉😊
  • shahar
    shahar replied to the thread areas in regular octagon.
    Thanks, it warn my heart. Thank you. I meant the my hair dye is black and white because I am old.
  • shahar
    shahar reacted to The Highlander's post in the thread areas in regular octagon with Like Like.
    Not a problem, I know English is not your native tongue (Hebrew, is I believe?) and that English is a very difficult language to master...
  • The Highlander
    The Highlander replied to the thread Trigonometry problem.
    With the sketch marked up the way I have done above, you might then see a more direct (& elegant?) way to determine the lengths of x &...
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