4,355 reputation
11767
bio website
location
age
visits member for 2 years, 1 month
seen 23 hours ago

Feb
17
revised When the continuum hypothesis settles the uniqueness (upto isomorphism) of the Hyper-reals doesn't it mean the hypothesis should be an axiom?
edited title
Feb
16
comment Why can't I obtain values of Sine/Cosine with $f(x)=\sqrt{1-x^2}?$
There's just one more thing I still couldn't connect: Why do they say that the sine is the vertical coordinate and the cosine is the horizontal coordinate? I got stuck for a lot of time because I believed this was true. But actually - just as you said - the formulation is a little different.
Feb
10
comment Why can't I obtain values of Sine/Cosine with $f(x)=\sqrt{1-x^2}?$
Now it makes sense: $\sin \theta= \frac{Opp(\theta)}{Hyp(\theta)}$, the hypotenuse in this case was always 1. Then I was doing $\frac{f(x)}{1}=f(x)$. The idea of having to use the reverse trig function to get the angle is a revolution to me. Thanks. You taught me more trigonometry with the answer and comments than my school in 3 years.
Feb
9
accepted Why can't I obtain values of Sine/Cosine with $f(x)=\sqrt{1-x^2}?$
Feb
8
comment Why can't I obtain values of Sine/Cosine with $f(x)=\sqrt{1-x^2}?$
One curiosity: If this gives the location of the point in the perimeter of the circle, why isn't this used to get values for the Sine and Cosine? In the image I provided, it says that the Sine is the vertical coordinate of the point, and the cosine is the horizontal coordinate. I've found both with my formula, no? I'm confused about what's the difference between them.
Feb
8
comment Why can't I obtain values of Sine/Cosine with $f(x)=\sqrt{1-x^2}?$
What do you think about my first note? Do you think that this function would work to find the points $(x,y)$ on the circle? I'm thinking that perhaps this is a way of finding the points based on length, not angle. What do you think?
Feb
8
asked Why can't I obtain values of Sine/Cosine with $f(x)=\sqrt{1-x^2}?$
Feb
2
comment Skein Tree: Conway Polynomial
I'm interested in the question. Although I know nothing about knots. I'd suggest you to try a more attractive titling.
Feb
2
comment Skein Tree: Conway Polynomial
Excuse-me, but what's the source of the material you presented here?
Feb
1
comment Evaluate $\int_{-\pi}^\pi \big|\sum^\infty_{n=1} \frac{1}{2^n} e^{inx}\big|^2 \operatorname d\!x$
I didn't know that double dollar $$_$$ works in the title too. It gets beautiful.
Feb
1
comment % of my equivalent human life hunting a fly for 5 minutes before I kill it, if its lived for 3 days and myself for 40 years
@Ayesha You have revealed your mathematical hipsterism.
Jan
31
comment What is the meaning of $(x^2+y^2)^n$? Is this an already known geometric object?
Look here.
Jan
29
reviewed Leave Open Motivation behind Definition of Projection [Poole P27]
Jan
29
reviewed Approve suggested edit on Intersection of ellipse with circle
Jan
29
awarded  Nice Question
Jan
29
reviewed No Action Needed How to construct a grammar G such that L(G)={x^ny^mx^my^n/m,n>1}?
Jan
29
reviewed Reopen What is probability?
Jan
29
reviewed Edit and Reopen Help with Adventures in Stochastic Processes
Jan
29
revised Help with Adventures in Stochastic Processes
added 7 characters in body
Jan
28
comment How to Self learn math
@BharathGRon Get the books I mentioned and see if you know stuff from them.