Identify the correct options for $f(r,\theta)=(r \cos \theta, r \sin \theta)$
65753
The Function $f:\mathbb{R}^{2}\rightarrow \mathbb{R}^{2}$ defined by $f(r,\theta)=(r\cos\theta,r\sin\theta)$
77975
How to force correct answers for Integrals of Cos[mx]*Cos[nx]?
32432
Strategies to find the set of functions $f:\mathbb R\to\mathbb R$ satisfing the functional equation: $f(x^3)+f(y^3)=(x+y)(f(x^2)+f(y^2)-f(xy))$
133333
Find $f(x)$ for $f(f(x))=\sin x$
80895
half sine and half cosine quaternions
106284
Establishing a Basis for $F[x]/(f(x))$
18335
Fourier transform of a radial function
149913
Evaluate $\iint dy\,dx;\frac{\pi}{4}\leq\theta \leq\frac{3\pi}{4};0\leq r\leq2$
149850
Methods for determining the convergence of $\sum\frac{\cos n}{n}$ or $\sum\frac{\sin n}{n}$
19083
Do you use degrees or radians for trig functions?
93543
Can I switch to polar coordinates if my function has complex poles?
53135
Find $4\cos\theta-3\sin\theta$, given that $4\sin \theta +3\cos \theta = 5$
97768
Why is $R\cos{a} = mg$ in circular motion compared and not $R = mg\cos{a}$?
24128
How do i show that $w=z^2$ maps $|z-1|\leq 1$ onto $R=2(1+\cos \theta)$?
158971
Computing the Fourier series of $f(\theta)=(\pi-\theta)^2/4$ for $0\leq\theta\leq{2\pi}$
144859
Finding parameters for $f(x) = x^2 + 2(m − a)x + 3am −2 = 0$ that satisfy a condition.
91521
Ambiguity of notation: $\sin(x)^2$